What is the correct answer?
4
A. 1 - k + k (p₁/p₂)1/n
B. 1 + k - k (p₂/p₁)1/n
C. 1 - k + k (p₁/p₂) n- 1/n
D. 1 + k - k (p₂/p₁) n-1/n