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Interference pattern is observed at 'P' due to superimposition of two rays coming out from a source 'S' as shown in the figure. The value of 'l' for which maxima is obtained at 'P' is: (R is perfect reflecting surface)   [JEE Main Online Paper ( Held On 12 Apirl  2014 )

A) \[1=\frac{1n\lambda }{\sqrt{3}-1}\]                        

B) \[1=\frac{(2n-1)\lambda }{2\left( \sqrt{3}-1 \right)}\]

C) \[1=\frac{(2n-1)\lambda \sqrt{3}}{4\left( 2-\sqrt{3} \right)}\]     

D) \[1=\frac{(2n-1)\lambda }{\sqrt{3}-1}\]