Radha and Gyanesh has three daughters - Manuja, Tarini and Sushma. Tarini is married to Jay. Sushma is married to Abhay. Gyanesh's third son in law is Akhil. Akhil has two childrens Piyush and Rani. Jay has two daughter Richa and Neha. Mridul is the only son of Abhay. How Radha is related to Rani?

A

Grand Mother

B

Mother in Law

C

Mother

D

Cousin sister