The correct answer is B. H2SO4.
H2SO4 is a strong acid that is used as a catalyst in the production of high octane fuels. It is also used in the production of fertilizers, detergents, and other chemicals.
HNO3 is a strong acid that is used in the production of explosives, dyes, and other chemicals.
HCl is a strong acid that is used in the production of hydrochloric acid, PVC, and other chemicals.
HF is a weak acid that is used in the production of hydrofluoric acid, aluminum fluoride, and other chemicals.
In the production of high octane fuels, H2SO4 is used to convert the lower octane hydrocarbons into higher octane hydrocarbons. This is done by a process called catalytic cracking. In catalytic cracking, the hydrocarbons are heated to a high temperature and then passed over a catalyst. The catalyst causes the hydrocarbons to break down and rearrange into new hydrocarbons with higher octane ratings.
H2SO4 is a good catalyst for catalytic cracking because it is a strong acid and it is also a good conductor of heat. The strong acid helps to break down the hydrocarbons, and the good conductor of heat helps to keep the reaction going at a high temperature.
The other acids listed in the question are not as good catalysts for catalytic cracking as H2SO4. HNO3 is a strong acid, but it is not a good conductor of heat. HCl is a strong acid and it is a good conductor of heat, but it is not as good a catalyst for catalytic cracking as H2SO4. HF is a weak acid and it is not a good conductor of heat.