General Studies · Floor and Flat Puzzle

Directions: Study the following information carefully and answer the question given below. Eight persons—A, B, C, D, W, X, Y, and Z—are living in a four-story building such that the ground floor is numbered as 1, the floor immediately above it is numbered as 2, and so on. Each of the floors has two flats: Flat P and Flat Q. Flat Q is to the east of Flat P. Flat P of floor 2 is immediately above Flat P of floor 1 and immediately below Flat P of floor 3, and so on. Similarly, Flat Q of floor 2 is immediately above Flat Q of floor 1 and immediately below Flat Q of floor 3, and so on. - D lives immediately above the flat in which A lives, in the same flat type, but not in Flat Q. - There are two floors between the floors on which A and Z live. - There is only one floor between the floors on which Z and B live. - Y, who lives on an even-numbered floor, lives above the floor on which C lives. - C lives below the floor on which X lives. - C and X live in the same flat type, but not with Z. If W and B interchange their positions, then who among the following lives immediately below B?