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: O a. DEBIT Services Revenues OMR 15,000 and CREDIT Cash OMR 4,000 b. DEBIT Cash OMR 15,000 and CREDIT Unearned Service Revenues OMR 15,000 c. DEBIT Unearned Service Revenues OMR 15,000 and CREDIT Cash OMR 15,000 d. No entry-not a transaction e. DEBIT Cash OMR 15,000 and CREDIT Services Revenues OMR 15,000