I think the answer should be D, as strange as it seems, because there is a contradiction in the sentence... the polio vaccine is being given to everyone but only some benefit, whereas mass dietary change will impact a significant number of people.

'A' looks better to me. However, I am not sure whether "just as X, Y" is an idiom.

Answer has to be between A and B

A - incorrect idiom --- the correct idiom is just as X , so Y ...
B - using 'like' but two clauses are being compared ... so we need 'as'...

So I'm not sure which one is it.

IMO - B...though C also sounds correct.

I pick D here because we have a contradiction here..
A is out because of incorrect idiom..
B -> can't use like, faulty comparison
c -> Unnecessarily changing non-essential modifier to essential one
E ->wrong placement of adverb 'actually'

OA please?

What are we comparing ??????????

We are comparing actions -- just as is correct

Just because just as is given it doesn't mean that so must be there

Answer is A

OA is C

Can anyone explain

It should be A not C

C changes the meaning so the given sentence

252. Dr. Hegsted argues that just as polio vaccine is given to every person to protect the few who might actually contract polio, mass dietary change is needed to protect the significant number who are susceptible to the life-threatening effects of press eating habits.
(A) just as polio vaccine is given to every person to protect the few who might actually contract polio
(B) like polio vaccine, which is given to every person to protect the few who might contract polio
(C) similar to polio vaccine which is given to every person in order to protect the few who might actually contract polio
(D) while, to protect the few who might actually contract polio, polio vaccine is given to every person
(E) similar to the giving of polio vaccine to every person in order to protect the few who might contract polio actually

my answer: A

given ... change

can anyone explian why B is wrong?

C should not be correct because there is no comma before "which"

mehravikas wrote:C should not be correct because there is no comma before "which"

Actually I asked for a reason to eliminate B

Yup.

Don't see a reason for 'C' to be correct.

crackgmat007 wrote:

mehravikas wrote:C should not be correct because there is no comma before "which"

Actually I asked for a reason to eliminate B