Pointing to a man in a photograph Mohan says, "He is the son of my wife's mother-in-law." How is the man related to Mohan?

Brother

Let's analyze the statement step by step:

• Mohan's wife's mother-in-law = Mohan's mother.
• (The mother-in-law of Mohan's wife is Mohan's mother.)
• Therefore, "the son of my wife's mother-in-law" = the son of Mohan's mother.
• The son of Mohan's mother could be Mohan himself or Mohan's brother. Since Mohan is pointing to another man in the photograph, it refers to Mohan's brother.