Maximum cement content, maximum water cement ratio and minimum grade of concrete with nominal weight of aggregate of 20 mm size for very severe exposure condition as per IS456-2000are respectively

A

340;0.45; $$M_{35}$$

B

400;0.5; $$M_{40}$$

C

360;0.45; $$M_{40}$$

D

320;0.5; $$M_{35}$$