If money is mistakenly transferred to the wrong account using UPI, is it possible to get a refund?

A) Yes, refunds are not possible for UPI transactions.
B) No, UPI transactions are irreversible, and once transferred, the money cannot be refunded.
C) Maybe, it depends on the policies of the respective banks and the time elapsed since the transaction.
D) Refunds can only be obtained if the recipient willingly returns the money.