Question

Assertion (A): The earth is the only planet known to support life.

Reason (R): The earth is a terrestrial planet like Mercury and Venus.

Options

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

• Both A and Rare true but R does not explain A.

• A is true but R is false.

• A is false but R is true.

Answer 1

A is true but R is false.

Explanation:

• Assertion (A) is true: Earth is indeed the only known planet that supports life, due to a combination of factors like the presence of liquid water, an atmosphere containing oxygen, and a moderate temperature range.
• Reason (R) is false: While the Earth is a terrestrial planet, like Mercury and Venus, this fact does not explain why Earth supports life. Mercury and Venus are also terrestrial planets, but they do not have the necessary conditions (like water, a suitable atmosphere, and a livable temperature range) to support life as Earth does. Therefore, the reason does not explain the assertion.