a. To reduce the emission of sulphur dioxide in exhaust fumes

b. To increase the efficiency of automobiles engines

c. To use sulphur removed from petroleum for commercial purposes

d. To increase the life span of engine silencers

Answer: a. To reduce the emission of sulphur dioxide in exhaust fumes

Explanation: By removing sulfur from gasoline and diesel, the release of sulfur dioxide is a very dangerous air pollution. It can damage the vegetation by causing chlorosis. It can cause acid rain which damages buildings and plants. In humans it causes eye irritation and damage to the respiratory system such as bronchitis.