Preheating of coal charge for the coke ovens reduces the
(A) Time of carbonisation
(B) Yield of gas and tar
(C) Fuel consumption in coking
(D) All (A), (B) and (C)
(A) Time of carbonisation
(B) Yield of gas and tar
(C) Fuel consumption in coking
(D) All (A), (B) and (C)