Assertion (A): Existence of human life on Venus is highly improbable.
Reason (R): Venus has extremely high level of carbon dioxide in its atmosphere.
A
Both (A) and (R) are individually true and R is the correct explanation of A
B
Both (A) and (R) are individually true and R is not the correct explanation of A
C
A is true but R is false
D
A is false but R is true
Correct Answer: Option A
Explanation
1. Assertion (A) is true. The conditions on Venus, including extremely high surface temperatures (around 460°C), crushing atmospheric pressure (over 90 times Earth's), and a dense, toxic atmosphere, make the existence of human life highly improbable.
2. Reason (R) is true. Venus's atmosphere is composed of about 96.5% carbon dioxide (CO2), which causes a runaway greenhouse effect leading to the extremely high surface temperatures.
3. The extremely high level of carbon dioxide (R) is the primary reason for the hostile environment described in (A). Therefore, R is the correct explanation of A.