Introducing a boy, Ankit said, 'He is the son of the daughter of my grandfather's son.' How is that boy related to Ankit?

Introduction / Context:
This question is effectively the same pattern as an earlier one: Ankit describes a boy through the phrase son of the daughter of my grandfather's son. You need to decode the chain and express the final relationship in standard family terms. The puzzle tests reading accuracy and familiarity with the idea that grandfather's son is normally interpreted as father in such questions.

Given Data / Assumptions:
- Reference person: Ankit. - A boy is being introduced. - The boy is the son of the daughter of Ankit's grandfather's son. - Grandfather refers to Ankit's grandfather in the usual sense. - In absence of other sons mentioned, my grandfather's son is interpreted as Ankit's father.

Concept / Approach:
We break the relationship down from top to bottom. Ankit's grandfather's son is taken as Ankit's father. The daughter of that man is one of Ankit's sisters (or possibly Ankit if Ankit is female, but the exam convention here usually treats her as a separate sister). The boy is the son of that daughter. The son of one's sister is a nephew. Thus, Ankit is the boy's maternal uncle or aunt, and the boy is Ankit's nephew.

Step-by-Step Solution:
Step 1: Identify my grandfather's son as Ankit's father under standard exam assumptions. Step 2: The daughter of Ankit's father is a female child in the same generation as Ankit. She is best interpreted as Ankit's sister. Step 3: The boy is the son of this daughter, meaning he is the son of Ankit's sister. Step 4: The son of your sister is your nephew. Step 5: Therefore, the boy is Ankit's nephew, and Ankit is his maternal uncle or aunt.

Verification / Alternative check:
If you sketch the family tree, place the grandfather at the top, his son (Ankit's father) in the middle and Ankit plus his sister at the bottom level. The sister has a boy (her son). That boy is one generation below Ankit and is related through Ankit's sibling. There is precisely one standard label for such a relation: nephew. No matter how you label genders, the structure remains uncle/aunt and nephew.

Why Other Options Are Wrong:
- Cousin: A cousin would share grandparents with Ankit but would be the child of an uncle or aunt, not of a sibling. - Brother: A brother shares parents with you, but the boy is the child of a sibling, not a sibling himself. - Father-in-law: This is a relation in a completely different generation and through marriage, not implied here. - Uncle: An uncle is a brother of a parent or spouse of an aunt, typically older, not one generation below.

Common Pitfalls:
Candidates often hesitate because my grandfather's son could, in principle, be an uncle instead of the father. In competitive exams, unless additional brothers are explicitly introduced, the phrase is usually intended to mean the direct parent. Another frequent mistake is stopping the chain at daughter and calling her a cousin, but that would require the grandfather's son to be an uncle, which the question does not force. Keeping to the simplest consistent interpretation leads to the correct nephew relationship.

Final Answer:
The boy introduced by Ankit is his nephew.