If $\sin \theta  = \frac{1}{2}\left( {\sqrt {\frac{x}{y}\,}  + \,\sqrt {\frac{y}{x}} } \right)\,,\,\left( {x,y \in R\, - \{ 0\} } \right)$. Then

  • A

    $x=y$

  • B

    $ x < y $

  • C

    $x>y$

  • D

    $x+y$ = $1\ \forall\ x,y \in  R$

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