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Although aspirin irritates the stomach, it can be avoided if the aspirin tablet is given a coating that will not dissolve until the tablet reaches the intestine.
(A) Although aspirin irritates the stomach, it
(B) The irritation of the stomach caused by aspirin
(C) The fact that aspirin causes irritation of the stomach
(D) Aspirin causes stomach irritation, although it
(E) Aspirin irritates the stomach, which
first of all we have to find out what can be avoided if aspirin tablet is given a coating that will not dissolve....
Its the irritation. So it should come as a subject or if we use any clause, it should refer the irritation.
A- it does not refer the irritation. Actually we dont know what it refers
C- Here its Fact can avoided ...TOTALLY WRONG
D- we don't know what
it is referring. either aspirin or irritation
E- which is not referring to irritation
B - The subject is irritation that can be avoided .. CORRECT