Assertion(A): Motor vehicles equipped with catalytic converters should use unleaded petrol.
Reason(R): Lead over stimulates the catalyst platinum.
Choices for Assertions and reasons:
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Subtopic:  Air Pollution |
 64%
Level 2: 60%+
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Assertion(A): Burning of fossil fuels is harmful to humans, animals, and plants.
Reason(R): These air pollutants must be removed to keep our air clean.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Subtopic:  Air Pollution |
 64%
Level 2: 60%+
Hints