The coefficient of friction between the block and the horizontal surface is $\mathrm{\mu }$. The block moves towards right under action of horizontal force -F (figure-a). Sometime later another force P is applied to the block making an angle $\mathrm{\theta }$ (such that tan $\mathrm{\theta }$ = $\mathrm{\mu }$) with vertical as shown in (figure-b). After application of force P, the acceleration of block shall

 

• A

  increase

• B

  decrease

• C

  remains same

• D

  information insufficient for drawing inference.