Live GMAT classes with Target Test Prep start Nov 1 and Nov 21. First class free.

See classes
Target Test Prep · GMAT

Choose how you want to prepare

Learn live with an expert or move at your own pace. Every option includes the complete TTP study system.

Newsweek Readers’ Choice Awards 2026 winner: Target Test Prep, #1 Test Prep

Target Test Prep was voted #1 Best Test Prep in the 2026 Newsweek Readers’ Choice™ Awards.

★★★★★5.0563 reviews
GMATLiveTeachStarts Nov 1
Josh Braslow, Target Test Prep GMAT expert
LIVE ONLINE CLASSES

Get Ready for GMAT Test Day Faster with Live Online Classes

with Josh Braslow, 20+ years in test prep

Nov 1 · Josh Braslow
Sun · 1:00 to 4:00 PM ET
Nov 22 · Josh Braslow
Sun · 9:30 AM to 12:30 PM ET
Included
40 hours of live online classes + 6 months of TTP OnDemand
  • Attend the first class for free
  • Every class is recorded, so you never fall behind
View classes & enroll
Limited seats availableTarget Test Prep
EALiveTeachOnDemand5 seats leftStart anytime
EXECUTIVE ASSESSMENT

Target Test Prep EA OnDemand

Self-paced EA prep. Study on your schedule.

Logan Thompson
EXECUTIVE ASSESSMENT

Sep 6 to Dec 6, 2026

with Logan Thompson

165+ EA score guarantee
$05-day trial no automatic billing
Schedule
Sun · 9:30 AM to 12:30 PM ET
Included
40 hours of live online classes plus six months of access to the complete TTP EA OnDemand course.
  • 165+ EA Score Guarantee
  • 4,100+ Quant, Verbal, and Integrated Reasoning practice questions
  • 400+ hours of in-depth video lessons
  • 3,000+ step-by-step video solutions
View EA class & enroll Start free 5-day trial
Limited cohort · enrollment openTrial includes full course accessTarget Test Prep
GMATOnDemandStart anytime
SELF-PACED MASTERCLASS

Target Test Prep GMAT OnDemand

Complete access from day one. Study on your schedule.

715+ score guarantee
$0to start then $127/mo
  • Personalized study plan and analytics
  • Thousands of lessons and practice questions
Start free 5-day trial
Read 563 reviewsTarget Test Prep

Compare the format, schedule, and included access before enrolling. Prices and seat counts shown reflect the supplied offer details.

Stomach Ulcers

Expert replies
Post new topic Locked
Subscribe topic
Previous Topic Next Topic
User avatar
Legendary Member
Posts: 777
Joined: Fri Jan 01, 2010 4:02 amFollowed by: 47 members
Location: Mumbai, India
Thanked: 117 times
by komal » Thu Feb 11, 2010 4:50 am
Recently physicians have determined that stomach ulcers are not caused by stress, alcohol. or rich foods, but a bacterium that dwells in the mucous lining of the stomach.

(A) not caused by stress, alcohol, or rich foods, but

(8) not caused by stress, alcohol, or rich foods, but are by

(C) caused not by stress, alcohol, or rich foods, but by

(D) caused not by stress, alcohol, and rich foods, but

(E) caused not by stress, alcohol, and rich foods, but are by

OA C
Top
Join the discussion
Source: — Sentence Correction |
Legendary Member
Posts: 758
Joined: Sat Aug 29, 2009 9:32 pmFollowed by: 2 members
Location: Bangalore,India
Thanked: 67 times

by sumanr84 » Thu Feb 11, 2010 4:56 am
Q is testing Idiom and ||ism

Not by X but by Y, where X and Y should be ||el structure.

C is clear winner
I am on a break !!
Top
Join the discussion
Master | Next Rank: 500 Posts
Posts: 241
Joined: Wed Jan 27, 2010 10:10 pmFollowed by: 2 members
Location: Chennai
Thanked: 23 times
GMAT Score:690

by sars72 » Thu Feb 11, 2010 4:57 am
for parallelism rule to be maintained, "not..by" should be coupled with "but.. by"
(A) not caused by stress, alcohol, or rich foods, but
parallelism error
(8) not caused by stress, alcohol, or rich foods, but are by
parallelism error.. presence of "are"
(C) caused not by stress, alcohol, or rich foods, but by
seems ok
(D) caused not by stress, alcohol, and rich foods, but
and is wrong. the items in the list should be seperated by or becuase they are independent.
(E) caused not by stress, alcohol, and rich foods, but are by
same as D

--> Correct Answer is C
Top
Join the discussion
Master | Next Rank: 500 Posts
Posts: 221
Joined: Mon Dec 22, 2008 6:24 pm
Thanked: 2 times

by mgmt_gmat » Thu Feb 11, 2010 4:57 am
Nt X but Y .. is the correct idiom here.

not by ... but by.. is correct here.

are caused ( not by..... but by)

Hence but are by is wrong here.
Top
Join the discussion
User avatar
Senior | Next Rank: 100 Posts
Posts: 60
Joined: Tue Oct 13, 2015 9:05 am

by AsadAbu » Fri Sep 09, 2016 7:32 am
komal wrote: Recently physicians have determined that stomach ulcers are not caused by stress, alcohol. or rich foods, but a bacterium that dwells in the mucous lining of the stomach.

(A) not caused by stress, alcohol, or rich foods, but

(8) not caused by stress, alcohol, or rich foods, but are by

(C) caused not by stress, alcohol, or rich foods, but by

(D) caused not by stress, alcohol, and rich foods, but

(E) caused not by stress, alcohol, and rich foods, but are by
The question is totally Parallelism issue. Here the correct answer is C. But, my question is: WHY not B. B makes parallelism to me!
B. NOT (tag)+CAUSED (verb)+by+something....................BUT (tag)+ARE (verb)+by+Something
Indicate parallelism to each other.
Thanks...
Top
Join the discussion