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

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  1. ηma x ηm x ηv = ηo
  2. ηm = ηv . ηma
  3. ηma = ηm x ηv
  4. ηv = ηm x ηma

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Answer: Option 2

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