Pointing to a photo Sunita said, she is my brother-in-law’s only sister. How is that women in photo related to Sunita?

Correct option is D

Given- Pointing to a photo Sunita said, she is my brother-in-law’s only sister. How is that women in photo related to Sunita

that women in photo is sister-in-law of  Sunita.

option d is correct.