Q56-60: In a talk show, there are 7 chairs in a row - opposite to the host of the program. Seven discussants - A, B, C, D, X, Y, and Z will…

Q56-60: In a talk show, there are 7 chairs in a row - opposite to the host of the program. Seven discussants - A, B, C, D, X, Y, and Z will participate in the talk show. The chairs are numbered 1 to 7 from left to right. The sitting plan must be done according to the following conditions: A must occupy 1st, 2nd or 3rd chair. C must sit immediately before B. D cannot sit in the 1st or last chair. X must sit either in the 1st or last chair. Y must be on one of the last three chairs.

Which of the following is an acceptable order for the sitting arrangement?

1. a) A, Z, C, D, Y, B, and X.
2. b) C, B, A, D, Z, Y, and X.
3. c) D, Z, A, C, B, X, and Y.
4. d) X, A, Y, C, D, B, and Z.