A block of mass m lying on a rough horizontal plane is acted upon by a horizontal force P and another force Q inclined at an angle \[\theta \] to the vertical. The block will remain in equilibrium, if the coefficient of friction between it and the surface is [Haryana CEE 1996]

• A.                 \[\frac{(P+Q\sin \theta )}{(mg+Q\cos \theta )}\]                
• B.                    \[\frac{(P\cos \theta +Q)}{(mg-Q\sin \theta )}\]          
• C.                 \[\frac{(P+Q\cos \theta )}{(mg+Q\sin \theta )}\]                             
• D. \[\frac{(P\sin \theta -Q)}{(mg-Q\cos \theta )}\]