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Q.

Given below are two statements: one is labeled as Assertion A and the other is labeled as Reason R.Assertion A: Hydrogen is the most abundant element in the Universe, but it is not the most abundant gas in the troposphere.Reason R: Hydrogen is the lightest element.In the light of the above statements, choose the correct answer from the options given below:

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a

A is false but R is true

b

Both A and R are true but R is NOT the correct explanation of A

c

A is true but R is false

d

Both A and B are true and R is the correct explanation of A

answer is B.

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