This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
Which one of the following is not source of manager's power – 
Select and explain. 
A. Reward, B. Coercive, C. Legitimate, D. Efferent
D: Efferent
Answer: D: Efferent 
Explanation: Management power 

Power is the ability to influence people.
Management power is, how a manager can make his subordinates do what he wants them to do.
Manager can use following types of power to do so : -


Reward power → Reward based
Coercive power → Fear based
Legitimate power → Position based
Expert power → Knowledge based
Reverent power → Personality based