A particle starting from the origin $(0, 0)$ moves in a straight line in the $(x, y)$ plane. Its coordinates at a later time are $(\sqrt 3 , 3) .$ The path of the particle makes with the $x-$axis an angle of ......... $^o$

  • [AIPMT 2007]
  • A

    $45$

  • B

    $60$

  • C

    $0$

  • D

    $30$

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  • [AIPMT 1995]