JEE Main Physics question

A block is kept on an inclined plane of inclination θ and length l. The velocity of the particle at the bottom of the incline is (the coefficient of friction is μ) [DCE 2005]

• (A)√(2gl(μcosθ − sinθ))
• (B)√(2gl(sinθ − μcosθ))Correct
• (C)√(2gl(sinθ + μcosθ))
• (D)√(2gl(cosθ − μsinθ))