Question

Given below are two statements : one is labelled as Assertion A and the other is labelled 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 :

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

Answer 1

Answer: (B)

Most abundant gas in the troposphere is nitrogen.