Pointing to a photograph of a woman Rohan says, "She is the sister-in-law of the only daughter of my mother-in-law's husband." How is the Rohan related to the woman?

Brother in law

The correct answer is Option 3: Brother in law

• “My mother-in-law’s husband” → This is Rohan’s father-in-law
• “Only daughter of my father-in-law” → This is Rohan’s wife
• “Sister-in-law of my wife” → This refers to wife’s brother’s wife OR husband’s sister

So, the woman can be Rohan’s sister or sister-in-law.

Now, how is Rohan related to that woman?
Rohan can be brother of that woman or can be brother-in-law of that woman. Therefore, the correct answer is Option 3: Brother in law.