Keeping breadth constant, depth of a cantilever of length 'l' of uniform strength loaded with uniformly distributed load 'w' varies from zero at the free end and

A

$$(\frac{2W}{\sigma d}) * l$$ at the fixed end

B

$$\sqrt{(\frac{3W}{\sigma d})} * l$$ at the fixed end

C

$$\sqrt{(\frac{2W}{\sigma d})} * l$$ at the fixed end

D

$$(\frac{3W}{\sigma d}) * l$$ at the fixed end