ANS:A - leads to corrosion.

Presence of sulfur in gasoline primarily contributes to increased lead susceptibility when tetraethyl lead (TEL) is used as an octane booster. Therefore, the correct option is:

• Increases lead susceptibility.

• Lead Susceptibility: Sulfur compounds in gasoline can react with lead compounds (such as those from tetraethyl lead) used as an octane enhancer. This reaction can lead to the formation of lead sulfates, which are less soluble and can deposit on engine parts. These deposits can interfere with engine operation and increase engine wear.
• Corrosion: While sulfur itself does not directly cause corrosion in gasoline, sulfur compounds can form corrosive acids in combustion products, contributing indirectly to corrosion issues.
• Gum Formation: Sulfur does not have a direct impact on gum formation in gasoline. Gum formation is primarily influenced by the presence of unsaturated hydrocarbons and oxygenates in the fuel.
• Stabilization: Sulfur does not aid in stabilization of gasoline. Gasoline stabilization typically involves additives that prevent oxidation and the formation of gums and varnishes.