Study the following information carefully and answer the questions given below.

There are seven members in a family. There is no single parent. P is the only daughter of S. M is the grandmother of X. K is the brother-in-law of B. S is the husband of M. A is the only niece of B.

How X is related to B?

The correct option is Nephew.

Let's analyze the given family relationships step-by-step to determine how X is related to B:

1. Identify the couples and core family structure:
- "S is the husband of M" ⇒ (S ♂ = M ♀) forms a married couple.
- "M is the grandmother of X" ⇒ M and S are the grandparents of X.
- "There is no single parent" ⇒ Every parent in the family has a married spouse.

2. Identify children of S and M:
- "P is the only daughter of S" ⇒ P (♀) is a daughter of S and M. Since P is the only daughter, any other child of S and M must be male (a son).

3. Analyze B, K, and A:
- "K is the brother-in-law of B"
- "A is the only niece of B" ⇒ A (♀) is a female child of B's sibling.
- Since K is a brother-in-law to B and P is the daughter, P is married to K (K ♂ = P ♀).
- Thus, B is a son of S and M (B ♂), making B the brother of P.
- P and K are the parents of A (niece of B) and X.

4. Determine the gender and relation of X:
- P and K have two children: A and X.
- Since A is the only niece of B, A is the only female child among the siblings (children of P and K).
- Therefore, X must be male.
- As X is a male child of B's sister (P), X is the Nephew of B.