A is the daughter-in-law of C. B is the son of G. D is the brother-in-law of E. E is the grandmother of F. F is the only son of B. E has no siblings. H is the child of C and is not married. F is married. B has two children. There is no single parent in the family.

Which of the following statements is/are true?

The correct option is A is the sister-in-law of H.

Let us analyze the given information step-by-step to reconstruct the family tree:

1. F, B, and E's relations:
• F is the only son of B.
• E is the grandmother of F.
• B has two children. Since F is the only son, the other child of B must be a daughter.
• There is no single parent in the family. Therefore, every parent is part of a married couple.

2. Generation and Marriage structure:
• Since E is the grandmother of F, E belongs to the 1st (top) generation.
• E is married to someone in the 1st generation.
• B is in the 2nd generation (child of E) and is married to A.
• B is the son of G, which means G is the spouse of E in the 1st generation.
• Therefore, the top generation couple is G and E (G is male/female, E is female, making G the grandfather/grandmother).

3. Determining relations for A, C, H, and D:
• A is the daughter-in-law of C. Since G/E or C/G are parents of B, C and G are the same top-generation parent couple, or C is G. Specifically, C is married to E, making C and E the parents of B and H.
• H is the child of C and is not married. Since B is also a child of C and E, H is the sibling of B.
• A is married to B, so A is the daughter-in-law of C (and E).
• Since A is married to B, and H is B's sibling, A is the sister-in-law of H.

4. Verifying the given options:
• "A is the sister-in-law of H." is definitely true based on the family relations derived above.