Which of the following is NOT a source of noise pollution?

The correct answer is Option (1) → Automated office operation

Noise pollution is the state of unbearable and uncomfortable sound for human beings, caused by noise from different sources.

Option (1) Automated office operation — Not a source of noise pollution. The main sources are factories, mechanised construction and demolition works, and automobiles and aircraft. Office work is not one of them.

Option (2) Factories operation — A source of noise pollution. Various factories are among the main sources.

Option (3) Automobiles and aircraft — A source of noise pollution. Automobiles and aircraft are among the main sources.

Option (4) Mechanised Construction Works — A source of noise pollution. Mechanised construction and demolition works are among the main sources.