Based on the family photo album described, Dakshit is Sunita’s:
Meera shows her friend a family photo album. Pointing to a boy, she says, "This is Dakshit and he is my grandfather's only grandson." Later, she shows the photos of her grandfather's two sons, Jayesh and Vijay, and tells her that her grandfather has only two sons and no daughters. Pointing to a woman, she says, "This is my mother Sheetal, who is standing with her brother-in-law Vijay and his wife Sunita." Meera also shows the photo of her only sister Mamta.
Correct answer: B
Explanation
Meera's grandfather has only two sons, Jayesh and Vijay, and no daughters. Dakshit is the grandfather's only grandson. Meera's mother Sheetal is married to Jayesh (Vijay is her brother-in-law), and their daughters are Meera and Mamta. So the only grandson Dakshit must be the child of Vijay and his wife Sunita, which makes Dakshit Sunita's son.