The incomplete burning of petrol and Diesel produces?

The incomplete burning of petrol and Diesel produces?

  1. Nitric oxide
  2. Nitrogen dioxide
  3. carbon dioxide
  4. Carbon mono oxide
  5. None of the above/More than one of the above.

ANSWER: (4) Carbon mono oxide or (5)

Details: incomplete burning of petrol and Diesel produces Carbon mono oxide. But the product of burning also contains carbon dioxide and other products.