Y, Z, A, B, C, and D live on six different floors of the same building. The lowermost floor in the building is numbered I, the floor above it number 2 , and so on till the topmost floor is numbered 6 .
Only Y lives on the floor between the floors occupied by D and C. B lives on an even numbered floor, but not on floor 6. Z lives on the lowermost floor. D is immediately above B. Who is on the topmost floor?

Correct option is D

​B lives on an even numbered floor, but not on floor 6. Z lives on the lowermost floor. D is immediately above B. 

​Only Y lives on the floor between the floors occupied by D and C. 

The final arrangement is:

A is at topmost floor.