Four people (A, B, C, D) are sitting in a row. A is next to B, but not next to C. If C is not next to D, who must be sitting next to D?

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A A
B B
C C
D Cannot be determined

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Answer: A. A

• Explanation: A) A is correct because the only possible arrangements that satisfy all criteria are C-B-A-D or D-A-B-C, meaning D is always next to A.

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Four people (A, B, C, D) are sitting in a row. A is next to B, but not next to C. If C is not next to D, who must be sitting next to D?

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