A pipe of $$0.1 m^2$$ cross sectional area suddenly enlarges to $$0.3 m^2$$ cross sectional area. If the discharge of the pipe is $$0.3 m^3 /sec,$$ the head loss is,

A

2/g m of water

B

g/2 m of water

C

1g m of water

D

$$\sqrt g$$ m of water