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Senior Manager
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If A, then B. If B, then C. If C, then D. If all of the [#permalink]
 25 Oct 2006, 10:56
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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.
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Manager
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Anwer is C. What is the OA??
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Senior Manager
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OA is C. I got the logic now..
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VP
Joined: 21 Aug 2006
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arjsingh1976 wrote: OA is C. I got the logic now..
My friend, please dont post OAs so fast. Why not we take others' perspectives as well?? 
_________________
The path is long, but self-surrender makes it short;
the way is difficult, but perfect trust makes it easy.
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Current Student
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Formal logic CR. Helps to draw a diagram. The answer is (C) because the only way we could derive D is if A were to start. Think of it as a dependent chain reaction.
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