Paper 1 · People, Development and Environment
Which of the following statements are correct in the context of carbon monoxide emissions? 1. They are mainly due to incomplete combustion of fuel. 2. They are more evident in petrol engines. 3. Long-term exposure can cause nausea.
- Carbon monoxide is mainly due to incomplete combustion of fuel
- It is more evident in petrol engines
- Long-term exposure can cause nausea
A1 and 2 only
B1, 2 and 3 ✓ Correct
C2 and 3 only
D1 and 3 only
Correct answer: (B) 1, 2 and 3 — All three statements are correct, so that is the answer.
Explanation
★All three statements are correct, so that is the answer.
★Carbon monoxide comes mainly from the incomplete combustion of fuel.
★It is more evident in petrol engines.
★Long-term exposure to it can cause nausea.
★So each of the three statements is correct.
★So the answer is 1, 2 and 3.
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