In a family, there are six members A, B, C, D, E and F. A and B are a married couple, with A being the male member. C is A's brother. D is the only son of C. E is the sister of D. B is the daughter-in-law of F, whose husband has died. How is E related to C?

Introduction / Context:

This blood-relation puzzle combines marital relations, siblings and generational information to identify how one particular member, E, is related to another member, C. Questions of this type test whether you can build a correct family tree from multiple interconnected clues, including a widowed grandparent and a daughter-in-law.

Given Data / Assumptions:

• A and B form a married couple, with A being male.
• C is the brother of A, so C is male and in the same generation as A.
• D is the only son of C, so D is male and one generation below C.
• E is the sister of D, so E is another child of C, and she is female.
• B is the daughter-in-law of F, whose husband has died, so F is an older female (a widow) and the mother of A (and likely of C).
• We assume all relationships form one consistent family without adoptions.

Concept / Approach:

The puzzle is solved by placing each person into a generational diagram. We identify grandparents (like F), parents (A, B, C) and children (D, E). Once we understand which generation each person belongs to and who their parents are, it becomes easy to state how E is related to C using a standard kinship term.

Step-by-Step Solution:

Verification / Alternative check:

To cross-check, consider the older generation: F is described as having a husband who has died. B is F's daughter-in-law, so B is married to one of F's sons. The sons indicated are A and C; A is explicitly part of the married couple with B. So F is the mother of A (and likely C), making F the grandmother of D and E. In that setup, D and E are the children of C and grandchildren of F, perfectly matching the roles.

Why Other Options Are Wrong:

“Sister” would describe a same-generation relationship, but E and C are in different generations; C is the parent and E is the child.

“Cousin” would require D and E to belong to a different branch of the family, which contradicts the statement that C is D's father and that E is D's sister.

“Mother” reverses the generational relationship; nothing suggests that E is older than C or a parent of C.

Common Pitfalls:

Some candidates incorrectly treat “sister of D” as implying a lateral relationship for E, forgetting that to be a sibling of D she must share the same parent C. Carefully tracing who is the child of whom prevents this error. Writing the family tree generation by generation is especially helpful in such puzzles.

Final Answer:

E is related to C as his daughter.