Water cement ratio is
(A) Volume of water to that of cement
(B) Weight of water to that of cement
(C) Weight of concrete to that of water
(D) Both (a) and (b) of the above
(A) Volume of water to that of cement
(B) Weight of water to that of cement
(C) Weight of concrete to that of water
(D) Both (a) and (b) of the above