Match the following columns

Column I	Column II
a. Capital investment	1. Pay back period
b. Economically optimum level of resource use	2. Least cost combination
c. Economics of farm size	3. Linear programming
d. Optimum enterprise combination under constraining resources	4. Average cost curve

A. a-1, b-2, c-3, d-4

B. a-2, b-1, c-4, d-3

C. a-3, b-4, c-1, d-2

D. a-4, b-3, c-2, d-1

Answer: Option B