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If A, then B If B, then C. If C, then D. If all of the [#permalink]
24 Jun 2007, 08:21
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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.
Could someone please explain why C is the ans?
coz if not D, then it could be B or C and that means it could be A!
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