Question

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

• A. Both A and R are true and R is the correct explanation of A
• B. Both A and R are true and R is not the correct explanation of A
• C. A is true but R is false
• D. Both A and R are false.

Answer 1

The correct option is B Both A and R are true and R is not the correct explanation of A

Methane is a component of greenhouse gases contributing to about 20% of global warming. However, it's source of production include sewage treatment plants, livestock farms, automobiles etc. Introduction of multi-point fuel injection engines in automobiles has decreased methane content in exhausts but this doesn't explain the assertion.

So, the correct answer is option B.