Explanation:

- T is the father of M and P, establishing T as the patriarch.

- P is the only daughter of V, implying V is P's mother.

- M, who is male due to being married to N, makes N the wife and therefore, the mother of A and B.

- A and B are children of M and thus grandchildren of T.

- Given P is the daughter of V, and P is a sibling of M, V is M's parent.

- This makes V the grandmother of M’s children, including B.

- Option:1, Grandmother - Correct Answer: V is B’s grandmother.

- Option:2, Uncle ? - Unrelated gender.

- Option:3, Aunt ? - Incorrect, as V is an elder generation.

- Option:4, Sister ? - Nonsensical with given family tree positioning.

- Option:5, Grandfather ? - Gender mismatch.

Green tick and conclusion: Grandmother is the correct answer. "."