On January 19th, 2021, Muscat Company Receive OMR 15,000 Cash in advance for service to be completed in the next 3 months. The Journal Entry should be: Select one: Select one: a. DEBIT Uneared Service Revenues OMR 15,000 and CREDIT Cash OMR 15,000 O b. DEBIT Cash OMR 15,000 and CREDIT Unearned Service Revenues OMR 15,000 O c. DEBIT Cash OMR 15,000 and CREDIT Services Revenues OMR 15,000 d. DEBIT Services Revenues OMR 15,000 and CREDIT Cash OMR 4,000 Oe. No entrynot a transaction