If rpm required is 25 at the output of gear box attached to a 5HP motor, Which of the following motors suit the best considering amount of power (electricity/ energy saving):
Selection of motor rpm and gear ratio
A) 5HP 2POLE MOTOR
B) 5HP 4POLE MOTOR
C) 5HP 6POLE MOTOR
D) 5HP 8POLE MOTOR
Kindly please answer along with justification/ proof.