While some academicians believe that business ethics should

[RBBmba@2014]

While some academicians believe that business ethics should be integrated into every business course, others say that students will take ethics seriously only if it would be taught as a separately required course.

A) only if it would be taught as a separately required course
B) only if it is taught as a separate, required course
C) if it is taught only as a course required separately
D) if it was taught only as a separate and required course
E) if it would only be taught as a required course, separately

OA: B

P.S: Although I got it right easily, but a quick clarification is required - in B two PARALLEL entities are connected without a conjunction. HOW THIS IS POSSIBLE in GMAT ? (It appears that as all other options have errors hence B stands out to be the OA even with this issue!)

@ Experts - would be curious to know from you about this DEVIATION in GMAT! Isn't this rare?

[GMATGuruNY]

in B two PARALLEL entities are connected without a conjunction. HOW THIS IS POSSIBLE in GMAT ? ])

@ Experts - would be curious to know from you about this DEVIATION in GMAT! Isn't this rare?

OA: as a separate, required course
Here, the modified noun (course) is preceded by two adjectives connected only by a comma.
This structure is rare on the GMAT, but it is perfectly fine.
Another example:
John is a happy, wealthy man.

[RBBmba@2014]

in B two PARALLEL entities are connected without a conjunction. HOW THIS IS POSSIBLE in GMAT ? ])

@ Experts - would be curious to know from you about this DEVIATION in GMAT! Isn't this rare?

OA: as a separate, required course
Here, the modified noun (course) is preceded by two adjectives connected only by a comma.
This structure is rare on the GMAT, but it is perfectly fine.
Another example:
John is a happy, wealthy man.

So, bottom-line is that although it's rare on the GMAT, still two PARALLEL entities CAN BE connected only by a comma (without a conjunction). Right ?

BTW, is this sort of DEVIATION visible in case of more than two PARALLEL entities ? I mean, can we have any official Qs that connects more than two PARALLEL entities only by a comma (without a conjunction) ?

Look forward to hear from you!

[GMATGuruNY]

So, bottom-line is that although it's rare on the GMAT, still two PARALLEL entities CAN BE connected only by a comma (without a conjunction). Right ?

Correct.
For other official examples of two parallel forms connected solely by a comma, check the end of my second post here:
https://www.beatthegmat.com/can-two-inde ... 83697.html

BTW, is this sort of DEVIATION visible in case of more than two PARALLEL entities ? I mean, can we have any official Qs that connects more than two PARALLEL entities only by a comma (without a conjunction) ?

This usage of commas seems to be limited to two parallel forms.
If there are more than two parallel forms, a conjunction is required.