If A and B are together, then which of the following must be necessarily true?
A, B, C and D are to be seated in a row. But C and D cannot be together. Also B cannot be at the third place.
If A and B are together, then which of the following must be necessarily true?
(A) C is not at the first place
(B) A is the third place
(C) D is at the first place
(D) C is at the first place
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