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Question

Assertion :The global mean temperature has increased by 0.6oC during 20th century. Reason: There has been a progressive increased combustion of fossil fuels generating more green house gases.

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

The correct option is A Both A and R are true and R is the correct explanation of A
The global mean temperature had increased by 0.6°C during the 20th century due to global warming. This has occurred due to the increase in greenhouse gases concentration in the atmosphere. There has been progressive increased combustion of fossil fuels generating more greenhouse gases.
So, the correct answer is option A.

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