Step 1: From the problem, Saroj is the mother-in-law of Vani and Vani is the sister-in-law of Deepak, which means Vani is married to Deepak’s brother.
Step 2: Rajesh is Deepak's father-in-law, and he is also the father of Ramesh, Deepak’s only brother.
Step 3: This means Saroj is Deepak’s mother, as she is Rajesh's wife.