Concept:The arrangement is solved by fixing the positions of A and B first, then placing F and E using the given constraints.
Explanation:A lives on an even-numbered floor.
Only three people live between A and B, so the floors of A and B differ by
4.
The possible floor pairs are
(2,6) or
(6,2).
B does not live on floor
2, so B must be on floor
6 and A must be on floor
2.
F lives on an even-numbered floor and immediately above E.
The possible positions for F are floors
2,
4, or
6.
F cannot be on floor
2 because A is there.
F cannot be on floor
6 because B is there.
Therefore, F lives on floor
4, and E lives immediately below on floor
3.
Only two people live between F and D.
Since F is on floor
4, D must be on floor
1.
The remaining floor
5 is occupied by C.
Thus, the person on floor number
3 is E.
Answer:E, i.e., Option (1).