Which Pump is More Efficient?

Sir:

May I know which Pump out of the following three is the most efficient for Negitive Suction Application for water supply application from a well ? ( suction lift 3.5 mt to 4.5 mt ).

We may consider Three Phase 415V , 50 HZ , 15HP Pump for 10 Years LCC having 16 hours working ( daily ).

1) Centrifugal Monoblock Pump

2) Submerged Centrifugal Pump

3) Centrifugal Monoset Pump

Which are the key governing factors to be considered while purchasing the most efficient pump for the abovementioned application?

Pl guide.

Tushar Shah