State ‘T’ for true and ‘F’ for false and choose the correct alternative.

I) Magnesium is a non- combustible metal.

II) A physical process in which a substance reacts with oxygen to give off heat is called combustion.

III) Alcohol, CNG and LPG are inflammable substances.

IV) Carbon dioxide is an excellent fire extinguisher.

V) At airport and petrol pump, soda-acid fire extinguishers are used.