The figure given below shows the relationship between power (P) and discharge (Q) for different vane exit angles of centrifugal pump. In the figure given below, curve C holds good for:

A

vane exit angle of $$90^\circ$$

B

vane exit angle of less than $$90^\circ$$

C

vane exit angle of more than $$90^\circ$$

D

any vane exit angle