A is father of C and C is sister of D. So, A is father of D. 

But D is son of B. So, B is the mother of D and wife of K Also. E is the brother of A So, B is the sister-in-law of E.

C is the daughter-in-law of A who is the grandmother of F means C is the mother of F. But F is the son of B. 

So. B is C's husband. But C, the lawyer is married to the Doctor So. B is the Doctor. F, the Accountant  will be the son of B and C. E is the unmarried Engineer 

So. the other mamed couple can be that of grandmother of F i.e, A and D.  But D, the Salesman, is married to the Lady Teacher. 

So. D, the Salesman, is the grandfather of F. father of B and the husband of A, the Lady Teacher. 

Clearly, from the given data, the relation between E and F cannot be determined. 

 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. 

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. 

Clearly, the speaker's brother is Pramod's maternal uncle. So, the speaker is Pramod's mother or his father's wife 

Q's mother is sister of P &  daughter of M.[sex of P and M are not clear]

S is daughter of P and sister of T.  [sex of P and T is not clear]

M's children : Q's mother and P

P's children  :S[female] and T

M is either Grandmother or Grandfather of T

Kailash's son's uncle ? Kailash's brother. So. the old man's son is Kailash's brother 

i.e., the old man is Kailash's father. 

Your mother's husband ? Your father; Your father's sister ? Your aunt. 

 So, lady's aunt is man's aunt and therefore lady is man's sister. 

Only son of Amar's mother's father ? Amar's maternal uncle. 

So, the girl's maternal uncle is Arnar's maternal uncle. Thus, the girl's mother is Amar's aunt. 

Daughter of brother-in-law ? Niece;

Mother's niece ? Cousin.

So, the girl is the cousin of Rita's friend.