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ABCD

by sumittaneja009 » Wed Nov 26, 2008 7:12 am
If A, then B.
If B, then C.
If C, then D.

If all of the statements above are true, which of the following must also be true?
(A) If D, then A.
(B) If not B, then not C.
(C) If not D, then not A.
(D) If D, then E.
(E) If not A, then not D.


OA is C
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Source: — Critical Reasoning |
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by raunekk » Wed Nov 26, 2008 9:21 am
imo:C

discussed many times..pls search!!

its known as contrapositive...
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by Tryingmybest » Wed Nov 26, 2008 9:53 am
This link has a good Explanation https://www.beatthegmat.com/how-to-treat ... 13534.html
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by nicolette » Fri May 13, 2016 1:27 am
i think it's C
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