If the clearance ratio for a reciprocating air compressor is 'K', then its volumetric efficiency is given by

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

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