E is the son of A. D is the son of B. E is married to C, and C is the daughter of B. How is D related to E?

Introduction / Context:

This is a straightforward blood-relation question where you must connect in-laws and siblings. The presence of a marriage (E married to C) and their parents (A and B) naturally leads to a brother-in-law relation somewhere. Correctly placing D in the family tree relative to E is the main goal.

Given Data / Assumptions:

• E is the son of A, so E is male.
• D is the son of B, so D is also male.
• E is married to C.
• C is the daughter of B.
• We are asked: How is D related to E?
• We assume a simple family tree where B is the parent of both C and D (making them siblings).

Concept / Approach:

The key is to notice that C and D share the same parent B, so they are brother and sister (or at least siblings). Since E is married to C, E becomes a son-in-law of B and an in-law relative of D. More specifically, the husband of someone's sister is that person's brother-in-law. We then express D's relationship to E using this standard in-law term.

Step-by-Step Solution:

Verification / Alternative check:

Imagine B has two children: C (daughter) and D (son). C marries E. In that scenario, any family would naturally describe E as D's brother-in-law and D as E's brother-in-law. There is no other common English kinship term that fits better. This confirms our reasoning.

Why Other Options Are Wrong:

D cannot be E's real brother, because they have different parents (A for E and B for D).

D is not E's uncle or father-in-law; those roles would involve a generational difference, whereas D and E are in the same generation and connected by a sibling's marriage.

Common Pitfalls:

Sometimes candidates try to connect everyone by blood and forget that marriage can introduce in-law relationships. Recognizing that C and D are siblings and that E's link to D is purely through marriage is crucial. When you see "son of B" and "daughter of B" alongside "married to", immediately think of brother-in-law or sister-in-law possibilities.

Final Answer:

D is related to E as his brother-in-law.