Verbal Reasoning - Blood Relation Test - Discussion

@All.
went deeper to solve this one.
Firstly,
Step-by-step Breakdown:
"My uncle"→ Could be father's brother or mother's brother.

"Father of my uncle"→ That’s your grandfather (on either maternal or paternal side).

"Daughter of the father of my uncle"
→ That means: daughter of my grandfather
→ She could be My mother OR my aunt (if grandfather had multiple children)

"Son of the daughter of the father of my uncle"
→ That’s: son of my mother → my brother
OR
→ son of my aunt → my cousin.

So, what’s the correct interpretation?
The girl is not saying "my mother", but is going indirectly through: Daughter of the father of my uncle

Which could refer to:

Her mother, if her mother is the daughter in question

Her aunt, if her aunt is the daughter in question

But the girl does not specify that the daughter is her mother, so it could be any daughter of the grandfather.

Thus, the most general and safest assumption is that the daughter is the girl’s aunt, making the boy her cousin.

So, the Final Answer: Cousin.

I am not getting this, please anyone explain me the answer clearly.

Yes, the right answer is brother.

I think the Cousin would be the correct option.