Blood relations – decode maternal branch precisely: Amit told to Alok, "Yesterday I defeated the only brother of the daughter of my grandmother." Whom did Amit defeat?

Introduction / Context:
The phrase "the daughter of my grandmother" identifies Amit's mother (if singular) or one of his maternal aunts. The "only brother" of that daughter is the maternal uncle.

Given Data / Assumptions:

• Grandmother refers to Amit's maternal grandmother in the conventional reading.
• "The daughter" (singular) signals the mother when posed in such puzzles, or uniquely identifies the maternal branch whose brother is the maternal uncle.

Concept / Approach:
Grandmother → daughter ⇒ mother. The only brother of one's mother is one's maternal uncle.

Step-by-Step Solution:

Verification / Alternative check:
If the grandmother had multiple daughters, "the daughter" would need specification. Standard test-convention interprets it as the mother unless otherwise noted; in either case, the daughter's only brother is still a maternal uncle of Amit.

Why Other Options Are Wrong:
Father/brother/son/father-in-law do not match the maternal-brother chain defined.

Common Pitfalls:
Switching to the paternal side or reading "grandmother's daughter" as "my daughter."

Final Answer:
My maternal uncle