Blood Relations Questions

The man said, "Her father is the only son of my father."

Then the woman's father and the man's is the same

=> The woman and the man are brother and sisters.

Hence, the man is the brother of the woman.

 Clearly, the only daughter or Monika's father is Monika herself 

So, Rahul's mother is Monika 

Thus, Monika's husband is the father of Rahul. 

Clearly, the lady is the grandmother of man's sister's son i.e.. the mother of the mother of man's sister's son 

i.e., the mother of man's sister. So, the lady is man's mother.  

Daughter of grandmother — Aunt: Aunt's only brother — Father. 

K is the father-in-law of H means H is the wife of the brother (say, J) of the daughter (say, L) of K and K is a male (brother or father of some person, say P) i.e H @ J $ L # K $ P or H @ J $ L # K & P.

Only son of woman's grandfather - woman's father;  Man's brother's father - Man's father 

So, man's father is woman's father i.e woman is the man's sister.

Asha's mother's mother is man's mother i.e.. A.sha's mother is man's sister or Asita is man's niece. 

Since the narrator has no brother, his father’s son is he himself. So, the man who is talking is the father of the man in the photograph. Thus, the man in the photograph is his son.