ordinary Portland cement

low heat cement

rapid hardening cement

sulphate resisting cement

gypsum

calcium chloride

calcium carbonate

none of the above

iron ore, coal and sulphur

iron ore, carbon and sulphur

iron ore, coal and lime stone

iron ore, carbon and lime stone

(i) and (ii)

(ii) and (iii)

(iii) and (iv)

(i)and(iv)

iron

carbon

manganese

sulphur