Assertion : A particle in $x-y$ plane is related by $x=a \sin \omega t$ and $y=a(1-\cos \omega t)$, where $a$ and $\omega$ are constants, then the particle will have parabolic motion. Reason : A particle under the influence of two perpendicular velocities has parabolic motion.

• A

  If both assertion and reason are true and reason is the correct explanation of assertion.
• B

  If both assertion and reason are true but reason is not the correct explanation of assertion.
• C

  If assertion is true but reason is false.
• Correct answer
  D

  If both assertion and reason are false.

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