What would be the production function if Q requires 2 units of L in the question below? Would it make a difference if K and L are complements instead of substitutes?

Question:

What is the production function if L and K are perfect substitutes and each unit of Q requires 1 unit of L or 1 unit of K (or

a combination of these inputs that adds up to 1)?

Select one:

a. Q=K+L - correct

b. Q=2K+1L

c. Q=k

d. Q=K+2L