A ball of mass $m$ is thrown vertically upwards. Another ball of mass $2m$ is thrown at an angle $\theta $ with the vertical. Both of them stay in air for same period of time. The heights attained by the two balls are in the ratio of

  • A

    $2:1$

  • B

    $1:\cos \theta $

  • C

    $1:1$

  • D

    $\cos \theta :1$

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