Pointing to a photograph,Nikita said,'She is the only granddaughter of my grandmother's daughter'. How is the girl in the photograph related to Nikita?

Showing a lady in the park,Ashok said,'She is the daughter of my grandfather's only son'. How is Ashok related to that lady?

Introducing a man to her husband,a woman said,"his brother's father is the only son of my grandfather." How is the woman related to this man?

Deepak is the brother of Ravi. Rekha is the sister of Atul. Ravi is the son of Rekha. How is Deepak related to Rekha?

These questions are based on the following information. Study it carefully and answer the questions.
$(i)$ $A \times B$ means $A$ is father of $B.$
$(ii)$ $A \div B$ means $A$ is daughter of $B.$
$(iii)$ $A + B$ means $A$ is sister of $B.$
$(iv)$ $A - B$ means $A$ is husband of $B.$
In $F - R + H \div T,$ how is $F$ related to $T?$

To find out the answer to the above question,which of the statements can be dispensed with?