Assertion A An astronaut inside a massive spaceship orbiting around the earth will experience a finite but small gravitational force. Reason $\mathbf{R}$ The centripetal force necessary to keep the spaceship in orbit around the earth is provided by the gravitational force between the earth and the spaceship.

• A

  Both (A) and (R) are true and (R) is the correct explanation of (A)
• B

  Both $(A)$ and $(R)$ are true and $(R)$ is not the correct explanation of (A)
• C

  (A) is true but (R) is not true
• Correct answer
  D

  (A) is not true but (R) is true

Hence, the correct answer is option: 'D'.