Manometric head, in case of a centrifugal pump, is equal to

• A. Suction lift + Loss of head in suction pipe due to friction + Delivery lift + Loss of head in delivery pipe due to friction + Velocity head in the delivery pipe
• B. Workdone per kN of water - Losses within the impeller
• C. Energy per kN at outlet of impeller - Energy per kN at inlet of impeller
• D. all of the above