If the present cost of the car is Rs. 1,00,000 residual value at the end of the 5th year is Rs. 20,000, the monthly depreciation is . . . . . . . .

The correct answer is C. Rs. 1,333.

Depreciation is the decrease in the value of an asset over time. It is calculated by dividing the original cost of the asset by its useful life. In this case, the original cost of the car is Rs. 1,00,000 and its useful life is 5 years. Therefore, the monthly depreciation is Rs. 1,333.

Option A is incorrect because it is the residual value of the car at the end of the 5th year.

Option B is incorrect because it is the total depreciation of the car over 5 years.

Option D is incorrect because it is the monthly depreciation of the car if its useful life is 4 years.