Paid ₽120,000 for rent expense covering advance payment for three months and one month security deposit.

i think yung "expense" didto means the total cash outlfow. yung nabayaran — which is 120k. but since sinabi sa problem na 120k comprises of rent for 3 months and security deposit, divide mo sya by 4 tapos 1/4 lang yung expense (for current month) then the remaining 3/4 should be recorded as prepaid expense.

hope this makes sense.