Various efficiencies of a centrifugal pump are related as (where, ηm = mechanical efficiency ηv = volumetric efficiency. ηma = manometric efficiency ηo = overall efficiency)

• A. ηma x ηm x ηv = ηo
• B. ηm = ηv . ηma
• C. ηma = ηm x ηv
• D. ηv = ηm x ηma