Madan’s brother’s uncle is Karan's father's brother. What can be the…

Concept

In a blood-relation chain, assign a generation level G(X) to each person. Siblings share a generation, and a parent’s sibling is one generation above the child. Equal generation levels do not by themselves prove a shared parent; when the stem asks what “can be” true, one valid family-tree construction is sufficient.

Application

1. Let B be Madan’s brother and U be B’s uncle. Since Madan and B are siblings, G(B) = G(Madan). Since U is B’s uncle, G(U) = G(Madan) − 1.

2. Let F be Karan’s father. Since U is also F’s brother, G(U) = G(F) = G(Karan) − 1.

3. Equating the two expressions for G(U) gives G(Madan) = G(Karan), so Madan and Karan must be in the same generation.

4. A valid construction is to make Madan and Karan sons of the same father F. Then U is F’s brother, so U is both Madan’s brother’s uncle and Karan’s father’s brother. In this construction, Madan and Karan are brothers.

Cross-check

• “Madan is Karan’s uncle” would require G(Madan) = G(Karan) − 1, which conflicts with the derived equal-generation condition.

• “Madan is Karan’s son” would require G(Madan) = G(Karan) + 1, which also conflicts with the derived condition.

• A cousin relationship can also fit an equal-generation family tree, but it is not one of the offered direct relationships. Its existence does not invalidate the question’s “can be” wording.

• Among the listed direct relationships, only the brother relationship has a valid construction, so the set-based choices do not apply.

Therefore, Madan can be Karan’s brother.