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?

$A$ woman introduces a man as the son of the brother of her mother. How is the man related to the woman?

Neelam,who is Deepak's daughter,says to Deepika,"Your mother Rekha is the younger sister of my father who is the third child of Ramlal." How is Ramlal related to Deepika?

All the six members of a family $A, B, C, D, E$ and $F$ are travelling together. $B$ is the son of $C$ but $C$ is not the mother of $B$. $A$ and $C$ are a married couple. $E$ is the brother of $C$. $D$ is the daughter of $A$. $F$ is the brother of $B$. Who is the wife of $E$?

$A$ is the brother of $B$. $B$ is the brother of $C$. $D$ is the father of $A$. Based on these three statements,which of the following statements cannot be definitely true?

$A + B$ means $A$ is the father of $B$; $A - B$ means $A$ is the wife of $B$; $A \times B$ means $A$ is the brother of $B$; $A \div B$ means $A$ is the daughter of $B$. If $P + R + S + Q$,which of the following is true?