A girl introduced a boy as the son of the daughter of father of her uncle. The boy is girl’s :

The correct answer is E. Nephew.

The girl’s uncle is the son of her father’s father. The boy is the son of the daughter of the girl’s uncle. This means that the boy is the grandson of the girl’s father’s father. This also means that the boy is the girl’s first cousin once removed.

A first cousin once removed is the child of a first cousin. In this case, the boy is the child of the girl’s first cousin. This makes the boy the girl’s nephew.

The other options are incorrect for the following reasons:

• Brother: The boy is not the girl’s brother because they do not have the same parents.
• Son: The boy is not the girl’s son because they do not have the same father.
• Uncle: The boy is not the girl’s uncle because he is not older than her and he is not her father’s brother.
• So-in-law: The boy is not the girl’s so-in-law because they are not married.

I hope this explanation is helpful. Please let me know if you have any other questions.