Which of the following statement about crude petroleum is NOT correct?

Crude petroleum consists of hydrocarbons of liquid and gaseous states varying in chemical composition, colour and specific gravity.

It is an essential source of energy for all internal combustion engines in automobiles, railways and aircraft.

Its numerous by-products are processed in petrochemical industries, such as fertiliser, synthetic rubber, synthetic fibre, medicines, vaseline, lubricants, wax, soap and cosmetics.

None of the above