Question

Assertion :Methane, component of green house gases, contributing to global warming is about 20 percent. Reason: Introduction of multi-point fuel injection engines in automobiles has decreased methane content in the exhausts.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
• C. Assertion is correct but Reason is incorrect.
• D. Both Assertion and Reason are incorrect.

Answer 1

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

The assertion is correct as methane is a component of green house gases contributing to global warming about 20 percent and thereby causes global warming. It is emitted by natural sources such as wetlands, as well as human activities such as leakage from natural gas systems and the raising of livestock.

The reason is also the correct and correct explanation as the introduction of multi-point fuel injection engines in automobiles has decreased methane content in the exhausts and thereby helps in decreasing the global warming. Efficient engine such as multi-point fuel injection engine can reduce the unburnt hydrocarbon (methane) in auto-emissions.

Therefore, the correct answer is option A.