Directions: The following items consist of two statements, one labelled as the. Assertion (A). and the other as. Reason (R). You are to examine these two statements carefully and select the answers to these items using the code given below:
1. Assertion (A): To orbit around the Sun, the planet Mars takes lesser time than the time taken by the Earth.
2. Reason (R): The diameter of the Planet Mars is less than that of the Earth.
A
Both A and R are true and R is the correct explanation of A
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
A is false but R is true
Correct Answer: Option D
Explanation
1. Assertion (A) is false. According to Kepler's Third Law, the time period of a planet's orbit around the Sun increases with the size of its orbit (average distance from the Sun). Mars orbits farther from the Sun than Earth does. Therefore, Mars takes longer time (about 687 Earth days) to orbit the Sun than Earth (about 365 days), not lesser time.
2. Reason (R) is true. The diameter of the Planet Mars (about 6,779 km) is indeed less than that of the Earth (about 12,742 km).
3. Therefore, A is false but R is true.