ISI2025-MCS-PCA | Question: 21

Question

There are 4 suspects, A, B, C, and D, say, in a criminal case. At least one of them is guilty. If A is guilty then so is B. If A and D are innocent, then so is C, and if A or C is innocent, then so is B. Suppose the police found out that B is guilty. From the given information, the persons who can be certainly declared guilty are:
(A) A, B, C and D         (B) A, B and C

 (C) B, C and D            (D) A, B and D

Answer 1

Kindly check if right or wrong @Deepak Poonia Sir?

Comments

@Shaik Masthan sir can u plz check 

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The answer is right. But, it is nothing saying about D.

As $A' \cap D' \rightarrow C' \equiv  C \rightarrow A \cup D$

either A or D or Both guilty. But We can't say D is guilty certainly from that.