Answer:
The correct option is Credit Service Revenue for $45
Explanation:
The receipt of $45 for the services rendered would be a debit to cash account and a credit to sales service revenue because an increase in cash is naturally a debit entry in cash account while increase in revenue is a credit entry.
Above all,debit of other operating expense is wrong because no cost was incurred instead a revenue was recorded.
Also,crediting cash was also wrong because the $45 was an inflow not an outflow of cash that require a credit entry in cash account.