A block is kept on an inclined plane of inclination $\mathrm{\theta }$ of length l. The velocity of particle at the bottom of inclined plane is (the coefficient of friction is $\mathrm{\mu }$)

• A

  $\sqrt{2\mathrm{gl} (\mathrm{\mu cos} \mathrm{\theta }-\sin \mathrm{\theta })}$

• B

  $\sqrt{2\mathrm{gl} (\sin \mathrm{\theta }-\mathrm{\mu cos} \mathrm{\theta })}$

• C

  $\sqrt{2\mathrm{gl}(\sin \mathrm{\theta }+\mathrm{\mu cos} \mathrm{\theta })}$

• D

  $\sqrt{2\mathrm{gl}(\cos \mathrm{\theta }+\mathrm{\mu sin} \mathrm{\theta })}$