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) If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
(b) If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
(c) If Assertion is correct but Reason is incorrect.
(d) If both the Assertion and Reason are incorrect.
(b) If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
Explanation:
Methane is produced by incomplete biomass combustion, incomplete decomposition mostly by anaerobic methanogens.
Carbon dioxide contributes about 60% of the total global warming and share of methane (CH4) and chlorofluoro carbons (CFCs) is 20% and 14% respectively. N2O also contributes 6% in total global warming. Efficient engine such as multi point fuel injection engine can reduce the unburnt hydrocarbon (methane) in auto-emissions.