'C' is the father of 'B'.'C' has only two children. 'D' is the sister of 'C,' and 'A' is the sister of 'B'. How is 'D' related to 'A'?

'A' and 'B' is a couple. 'B' is the sister of 'C'.'D' is the father of 'C'. How is 'D' related to 'A'?

'R' is the wife of 'T'.'S' is the brother-in-law of 'T'.'P' is the father of 'S'. How is 'P' related to 'T'?

Pointing towards a man, Pawan said, “his grandfather’s only son’s sister is my aunt". How is Pawan related to that man?

Moni is the wife of Sankar. Sankar is the brother-in-law of Mukesh Sharma. Rajeev is the son of Mukesh Sharma. How is Moni related to Rajeev?

Saniya is the only granddaughter of Leelawati. Reena is the sister of Mohan. Mohan is the son of Leelawati. How is Reena related to Saniya?