Answer & Explanation :
a. Prepaid Expenses : These are expenses paid before the due date.
Eg - April'19 rent already paid in March'19
b. Unearned Income : These are revenues received before the due date. It is also called Advance Income
Eg - March'19 commission already received in Feb'19.
c. Accrued Revenue : These are revenue earned & due to be received, but still not received. It is also called Outstanding Income.
Eg - March'19 commission earned revenue not received till March'19 end
d. Accrued Expense : These are expenses due but not paid. It is also called Outstanding Expense.
Eg - March'19 rent not paid till March'19 end
