Scrubber technology used in automobile to remove mainly which harmful gas from the exhaust with the help of water spray or lime:

Sulphur dioxide

The correct answer is Option (1) - Sulphur dioxide

A scrubber or scrubber system is a system that is used to remove harmful materials from industrial exhaust gases before they are released into the environment. A scrubber can remove gases like sulphur dioxide. In a scrubber, the exhaust is passed through a spray of water or lime.