Assertion (A): Existence of human life on Venus is highly improbable.
Reason (R): Venus has extremely high level of carbon dioxide in its atmosphere.
Ans. (a)
Explanation
Venus second closest planet after Mercury to the Sun is often considered 'Earth's twin' because of their close proximity in size, mass (weight) and density. Existence of human life is highly improbable because of high levels C02 in its atmosphere.