Multiple choice

The exhaust released from the automobiles causes various respiratory diseases. The main culprit present in it is

  1. carbon monoxide

  2. methane

  3. chlorine

  4. nitrogen dioxide

  5. -

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Carbon monoxide is the principal gas which is released in the auto mobile exhaust. It creates respiratory problems as it combines with haemoglobin faster than oxygen and it is poisonous too.