X and Y are partners in a firm. They withdrew @ Rs. 1,500 and Rs. 1,000 respectively on 15th day of every month for all the twelve months during 2009. Interest on drawings is chargable @ 10% per annum. What would be the interest on drawings respectively?

The correct answer is: A. Rs. 1,800 and Rs. 1,200.

Interest on drawings is calculated on the average balance of drawings during the year. The average balance of drawings for X is Rs. 1,500 x 12 / 2 = Rs. 9,000. The interest on this amount at 10% per annum is Rs. 9,000 x 10/100 = Rs. 900. The average balance of drawings for Y is Rs. 1,000 x 12 / 2 = Rs. 6,000. The interest on this amount at 10% per annum is Rs. 6,000 x 10/100 = Rs. 600.

Option B is incorrect because it is the total interest on drawings for both X and Y. Option C is incorrect because it is the interest on drawings at 10% per annum for the entire year. Option D is incorrect because it is the interest on drawings for one month at 10% per annum.