The total average cost of a firm on producing 5 units is Rs. 30/- and the average cost of producing 6 units is Rs. 32/-. The marginal cost of production of the sixth unit will be

The correct answer is A. Rs. 2.

Marginal cost is the change in total cost that arises when one additional unit of output is produced. In this case, the total cost of producing 5 units is Rs. 30/- and the total cost of producing 6 units is Rs. 32/-. Therefore, the marginal cost of producing the sixth unit is Rs. 2/-.

Option B is incorrect because it is the average cost of producing 6 units. Option C is incorrect because it is the total cost of producing 6 units. Option D is incorrect because it is the total cost of producing 5 units plus the marginal cost of producing the sixth unit.