The adjusted trial balance as at 30 June 2020 below has a missing account balance. Debit $ Credit $ Cash at Bank 72,000 Office Equipment 15,000 Accumulated Depreciation - Office Equipment 3,000 Accounts Payable 5,000 Capital 80,000 Service Revenue 32,500 3,000 Depreciation Expenses Salary Expense 18,000 108,000 120,500 The missing account and its balance could be: a. Accounts Receivable: Debit Balance $12,500 b. Bank Loan: Debit Balance $12,500 C. Supplies: Credit Balance $12,500 O d. Unearned Revenue: Debit Balance $12,500