Puzzle: How is the lady related to Benjamin?

PUZZLE: Pointing towards a lady, Benjamin said. “She is the daughter of the only child of my grandmother.”

How is the lady related to Benjamin?

1. Sister

2. Niece

3. Cousin

4. None of these

Solution & Explanation

The only child of Benjamin's grandmother is Benjamin's father. Now daughter of Benjamin's father is Benjamin's sister. So answer is option (1).