Two projectiles are thrown simultaneously in the same plane from the same point. If their velocities are $v_1$ and $v_2$ at angles $\theta _1$ and $\theta_2$ respectively from the horizontal, then answer the following question

The trajectory of particle $1$ with respect to particle $2$ will be

  • A

    a parabola

  • B

    a straight line

  • C

    a vertical straight line

  • D

    a horizontal straight line

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