Q.6 Which of the followings correctly describe the curves in the Diagram below? (i) Curve C represents the assumption that the marginal product of capital is positive. (ii) Curve B represents the assumption that the marginal product of capital is constant. (iii) Curve A represents the assumption that the marginal product of capital increases as K decreases. (iv) Curve C represents the assumption of increasing marginal product of capital. A. (iii) and (iv) only B. (i) and (ii) only C. (i), (ii) and (iii) only D. (ii), (iii) and (iv) only E. (i), (ii), (iii) and (iv).