Gopal said to Hari, 'My mother is your mother's mother-in-law.' Hari's father has no brothers. How is Gopal related to Hari?

Hari's mother's mother-in-law is Hari's paternal grandmother. Gopal is her son, so he is Hari's father or a paternal uncle. Hari's father has no brothers, so Gopal is Hari's father.