Automobiles are fitted with silencers and soft horns:

To meet the latest automobile trends

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To give better mileage

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To control air pollution due to fuel.

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To control noise pollution

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Solution

The correct option is D
To control noise pollution

Silencers and soft horns reduce the noise pollution by controlling the production of harmful sound waves that are a health hazard.

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Similar questions

Which of the following could be used to control air pollution from automobiles?

Carbon monoxide emitted by automobiles directly contributes to

(a) Water pollution

(b) Noise pollution

(d) All the people

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