Pointing to a lady on the platform, Manju said, “She is the sister of the father of my mother’s son.” Who is the lady to Manju?

The correct answer is C. Aunt.

Manju’s mother’s son is Manju’s brother. The sister of Manju’s brother is Manju’s aunt.

Option A is incorrect because Manju’s mother is not the lady on the platform.

Option B is incorrect because Manju and the lady on the platform are not sisters.

Option D is incorrect because Manju is not the lady on the platform’s niece.

Option E is incorrect because the lady on the platform is related to Manju.