Which one of the following statements about air pollution ca

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M: +2.00/-0.67

Which one of the following statements about air pollution caused by diesel engines is correct?

[CAPF 2017 Past paper]

It produces large quantity of carbon monoxide at lower and high temperatures

It produces huge quantity of nitrogen oxides at lower and high temperatures

It produces large quantity of carbon monoxide at lower temperature and nitrogen oxides at high temperature

it produces large quantity of nitro gen oxides at lower temperature and carbon monoxide at high temperature