$A$ man said to a lady,"Your mother's husband's sister is my aunt." How is the lady related to the man?

Pointing to a photograph,a person tells his friend,"She is the granddaughter of the elder brother of my father." How is the girl in the photograph related to the person?

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

If Neena says,"Anita's father Raman is the only son of my father-in-law Mahipal," then how is Bindu,who is the sister of Anita,related to Mahipal?

There is a family of six persons $A, B, C, D, E,$ and $F$. They are lawyer,doctor,teacher,salesman,engineer,and accountant. There are two married couples in the family. $D$,the salesman,is married to the lady teacher. The doctor is married to the lawyer. $F$,the accountant,is the son of $B$ and brother of $E$. $C$,the lawyer,is the daughter-in-law of $A$. $E$ is the unmarried engineer. $A$ is the grandmother of $F$. What is the profession of $B$?

Pointing to a photograph,Sachin said,"She is the grandmother of my father's sister's son." How is the woman in the photograph related to Sachin?