If Swati's father is the maternal grandfather of Divya, who is the daughter of Manya, then how is Manya's husband's father related to Divya? MCQ with Answer and Explanation

Pointing to a boy, Naveen said, 'His grandmother's only daughter is my grandmother's daughter.' How is that boy related to Naveen?

'A + B' means 'A is the daughter of B'.
'A$ B' means 'A is the husband of B'.
'A @ B' means 'A is the brother of B'.
'A & B' means 'A is the mother of B'.
'A% B' means 'A is the son of B'.
If 'W @S% K$G&U&T@R + C', then which of the following statements is correct?

Rahul's mother is the only daughter of Monika's father. How is Monika's husband related to Rahul?