A body B lies on a smooth horizontal table and another body A is placed on B. The coefficient of friction between A and B is \[\mu \]. What acceleration given to B will cause slipping to occur between A and B

• A.                         \[\mu g\]                      
• B.                         \[g/\mu \]            
• C.                         \[\mu /g\]                     
• D.                         \[\sqrt{\mu g}\]