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Railways PYQCBT 1 2016

RRB NTPC · Question 10

An assertion (A) and a reason (R) are given below. Assertion (A): Earth’s temperature will increase. Reason (R) :An increase in the level of Carbon dioxide will lead to an increase in temperature of Polar regions. Choose the correct option:

  1. Both A and R are true and R is the correct explanation of A

  2. Both A and R are true, but R is not the correct explanation of A

  3. A is true, but R is false

  4. A is false, but R is true

Show answer & explanation

Answer: (C) A is true, but R is false

Explanation

The official key treats the assertion as true and the reason as false. Rising greenhouse gases are expected to raise Earth's average temperature. The reason, as stated, narrows the effect of CO₂ to the polar regions alone, while extra CO₂ warms the whole planet, so the key marks it false.