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A is the brother of B. C is the mother of B. D is the father of C. How is A related to D?
Grandson
Son
Brother
Nephew
Grandson
Map the generation gap: A is one generation below C, and C is one generation below D, making A two generations below D (Grand-relation).
Map the generation gap: A is one generation below C, and C is one generation below D, making A two generations below D (Grand-relation).
Establish Relationships
A is the brother of B, meaning A and B are in the same generation. C is the mother of B, placing C one generation above A and B.
Establish Generation Gap
D is the father of C, placing D one generation above C. Thus, D is the maternal grandparent of A and B.
Determine Relation
Since A is male (brother of B) and is the grandchild of D, A is the grandson of D.
B: Son is incorrect as D is the grandfather, not the father of A. C: Brother is incorrect as A and D belong to different generations. D: Nephew is incorrect as the relationship is direct lineage (grandparent-grandchild), not collateral.
A is correct because A is the son of C, and C is the daughter of D, which confirms A is the grandson of D.
Always assign gender (where known) and mark generations (Gen 0, Gen +1, Gen -1) to avoid confusing maternal/paternal labels in complex family trees.