Kyle has banked with TRS Bank plc for many years. As well as granting Kyle an overdraft facility on his business account, TRS Bank plc also allows him to make use of a safe deposit box in which he keeps some important business documents. In relation to Kyle's possessions held at the bank, what is the legal nature of the relationship between Kyle and TRS Bank plc?

OA. Receivable (debtor)/payable (creditor)

OB. Bailor/bailee

OC. Mortgagor/mortgagee

OD. Principal/agent