Correct option is B
Given:
Raghu and Babu are twins.
Babu's sister is Reema.
Reema's husband is Rajan.
Raghu's mother is Lakshmi.
Lakshmi's husband is Rajesh.

From the given information blood relation tree will be.

Rajesh is Father-in-law of Rajan.
Thus, correct option is (b).