A schedule which shows interest constitutes reduced principal and unpaid balance is considered as

repaid schedule
depreciated schedule
amortization schedule
appreciated schedule

The correct answer is C. amortization schedule.

An amortization schedule is a table that shows how a loan is paid off over time. It includes the principal amount, interest rate, monthly payment, and the amount of interest and principal paid each month. The amortization schedule is used to calculate the total amount of interest paid over the life of the loan.

A repaid schedule is a table that shows how a loan has been repaid over time. It includes the principal amount, interest rate, monthly payment, and the amount of interest and principal paid each month. The repaid schedule is used to calculate the total amount of interest paid over the life of the loan.

A depreciated schedule is a table that shows how the value of an asset has decreased over time. It includes the original value of the asset, the depreciation rate, and the amount of depreciation each year. The depreciated schedule is used to calculate the book value of the asset.

An appreciated schedule is a table that shows how the value of an asset has increased over time. It includes the original value of the asset, the appreciation rate, and the amount of appreciation each year. The appreciated schedule is used to calculate the market value of the asset.

In the case of a loan, the interest constitutes reduced principal and unpaid balance. This means that the interest is paid first, and then the principal is paid. The amortization schedule shows how this happens over time.