Step-by-step Solution:

Solution Breakdown

Let's establish the relationships step-by-step from the given information to determine the final answer.

Building the Family Tree:

• "Divya is the wife of Ashok."
  

  This tells us Ashok and Divya are a married couple.

• "Divya who is the mother of Gaurav..." and "Ashok is the father of Tina..."
  

  This means Gaurav and Tina are children of Ashok and Divya.

• From the points above, we can definitively conclude that Gaurav and Tina are siblings (brother and sister). The information about other family members like Vicky, Shrikant, and Swarup helps confirm this structure.

Answering the Question:

The question asks: "How is Gaurav's wife related to Tina?"

• We have established that Gaurav is Tina's brother.
• Therefore, Gaurav's wife is the wife of Tina's brother.

Conclusion:

The wife of a person's brother is their Sister-in-law.

This corresponds to option C.