QWhich of the following statements are correct in the context of carbon monoxide emissions?

1. It is mainly due to incomplete combustion of fuel.

2. They are more evident in petrol engine.

3. Long-term exposure can cause nausea.

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• A 1 and 2 only ✔ ✖
• B 1, 2, and 3 ✔ ✖
• C 2 and 3 only ✔ ✖
• D 1 and 3 only ✔ ✖

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