
Answer:
Dec 31  Unearned rent revenue   $ 3675 Dr
              Rent Revenue       $3675 Cr
Explanation:
The adjusting entries are made at the end of period and as the rent revenue is received in advance, it is treated as a liability until it is earned.On 31 December, 3 months rent revenue has been eanred and as this revenue belongs to this year, following the accrual principle, we will record this as revenue and decrease the liability.
The three months rent revenue = 1225 * 3 = 3675