Various efficiencies of a centrifugal pump are related as (where, εm = mechanical efficiency εv = volumetric efficiency. εma = manometric efficiency εo = overall efficiency) ?
(A) ηma × ηm × ηv = ηo
(B) ηm = ηv . ηma
(C) ηma = ηm × ηv
(D) ηv = ηm × ηma
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