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Assertion (A) : The concentration of met...

Assertion (A) : The concentration of methane in the atmosphere has more than doubled in the last 250 years.
Reason (R): Wetlands and rice fields are the major sources of methane.

A

If both are true with reason being correct explanation

B

Both true but reason is not correct explanation

C

assertion is true but reason is wrong

D

Both are wrong

Text Solution

AI Generated Solution

The correct Answer is:
To solve the assertion and reason question, we will analyze both statements step by step. ### Step 1: Analyze the Assertion (A) - The assertion states that "The concentration of methane in the atmosphere has more than doubled in the last 250 years." - This statement is true. Methane levels have significantly increased due to various natural and anthropogenic (human-induced) sources. ### Step 2: Analyze the Reason (R) - The reason states that "Wetlands and rice fields are the major sources of methane." - This statement is also true. Wetlands are natural sources of methane due to the presence of methanogenic bacteria, and rice fields contribute to methane emissions during the anaerobic decomposition of organic matter in flooded conditions. ### Step 3: Determine the Relationship Between A and R - Both the assertion and the reason are true. - Additionally, the reason provides a valid explanation for the assertion. The increase in methane concentration can be attributed to the major sources mentioned (wetlands and rice fields). ### Conclusion - Since both the assertion and reason are true, and the reason explains the assertion, the correct answer is that both statements are true, and the reason is the correct explanation for the assertion. ### Final Answer - The correct option is: Both A and R are true, and R is the correct explanation of A. ---
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