Read the given information carefully and answer the questions given below:

Sixteen persons i.e. A, B, C, E, N, O, P, Q, R, S, T, U, V, W, X and Y live in two different flats i.e., Flat 1 and Flat 2 of a four-floor building such that the lowermost floor is numbered as 1 and the floor just above it is 2 and so on till the topmost floor is numbered as 4. Flat1 is to the west of flat 2 whereas flat 1 of floor 2 is immediately above flat 1 of floor 1 and flat 2 of floor 2 is immediately above flat 2 of floor 1. There are eight married couples and each married couple live together on the same floor in the same flat. Name of the person starts with vowel are female and live on an even numbered floor. All the information is not necessarily in the same order.

A lives just above P’s spouse flat. A’s spouse lives in an odd numbered flat. O and Q live on the same floor. T lives to north east of U and he lives below E. Q doesn’t live in the same flat as E. B who lives on an even numbered floor lives two floors above N. S lives to the south west of B but she doesn’t live below N. R lives to the north of X. R is not married to A. Spouse of X lives to the east of Y. C is spouse of neither Y nor X. V and U lives in the same flat and both have same gender. W’s gender is same as Q’s gender.

Four of the following five are alike in a certain way and thus form a group. Which among the following does not belong to the group?

The correct option is A-B.

Step-by-Step Explanation:

1. Understanding the Building Structure & Gender Rules:
• There are 4 floors (numbered 1 to 4 from bottom to top) and 2 flats on each floor (Flat 1 in the West, Flat 2 in the East).
• There are 8 married couples (16 persons total). Each married couple lives together in the same flat.
• Names starting with vowels (A, E, O, U) are females and live on an even-numbered floor (Floor 2 or Floor 4).

2. Deduction of Positions and Couples:
• B lives on an even-numbered floor (Floor 4) and 2 floors above N (Floor 2).
• S lives to the south-west of B, which puts S on Floor 3, Flat 1. B is on Floor 4, Flat 2.
• A lives on an even-numbered floor (Floor 4, Flat 1) just above P's spouse. Since S lives on Floor 3, Flat 1, P and S are married and live together on Floor 3, Flat 1.
• E is a female (vowel) on an even floor. Floor 4 is occupied by A and B, so E lives on Floor 2, Flat 2.
• By placing all 16 persons into their respective flats as married couples, we get:
- Floor 4, Flat 1: Couple 1 (A and her spouse)
- Floor 4, Flat 2: Couple 2 (B and E)
- Floor 3, Flat 1: Couple 3 (P and S)
- Floor 3, Flat 2: Couple 4 (R and O/Q)
- Floor 2, Flat 1: Couple 5 (N and O/Q)
- Floor 2, Flat 2: Couple 6 (E and T)
- Floor 1, Flat 1: Couple 7 (V and Y)
- Floor 1, Flat 2: Couple 8 (W and X)

3. Finding the Pattern:
• V-Y: A married couple living together in Floor 1, Flat 1.
• W-X: A married couple living together in Floor 1, Flat 2.
• B-E: A married couple living together on Floor 4, Flat 2.
• P-S: A married couple living together on Floor 3, Flat 1.
• A-B: A and B live in different flats (A lives in Flat 1 while B lives in Flat 2 of Floor 4).

Thus, A-B does not belong to the group as they are not a couple living in the same flat.