The figure below shows the relation ship between power(P) and discharge (Q) for different vane exit angles of centrifugal pump .In the figure given below curve B 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