The correct option is D Bank overdraft
Unfavourable balance as per pass book means debit balance or overdraft in the passbook. Passbook is a copy of the customer's account with the bank. It is prepared by the bank with the point of view of the bank. When we take a loan from the bank, we become debtor (asset) for the bank. So, the bank represents it by showing a debit balance overdraft balance in our passbook.