What is the correct answer?
4
A. (p₂/p₁) = [2/(n - 1)] n/(n + 1)
B. (p₂/p₁) = [2/(n + 1)] n/(n-1)
C. (p₂/p₁) = [(n - 1)/2] n + (1/n)
D. (p₂/p₁) = [(n + 1)/2] n - (1/n)
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