FD of the deceased with nominee and have Loan

Thanks for the wonderful articles and answering everyone questions! I have little complex case and would require your comments. My Mom has FD for 3 lakhs (multiple FDs) and nominee of those FDs are my mother’s brother family(3 person). Same FDs have been used to get educational loan for foreign studies of my cousin(1 member in the same family). Now, the loan has been paid completely. Question: 1. As the FD is used as collateral for loan, nominee still has rights to claim the amount? Note: I am the only legal heir for my mother.