The correct option is C Coal gas
Strong heating of coal in the absence of air is called destructive distillation of coal. The products obtained after distillation are coal tar, coal gas and coke.
Coal tar is a thick black liquid with an unpleasent smell. Coal gas is a gaseous fuel mainly made up of methane and hydrogen.
Bitumin and paraffin wax are obtained at different temperatures during the fractional distillation of petroleum.