The displacement of an oscillator is given by $x = a\, \sin \, \omega t + b\, \cos \, \omega t$. where $a, b$ and $\omega$ are constant. Then :-

  • A

    Motion is simple harmonic but not periodic

  • B

    Motion is periodic but not simple harmonic

  • C

    Motion is simple harmonic as well as periodic

  • D

    Motion is neither simple harmonic nor periodic

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