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

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.