A block A of mass 4 kg is placed on another block B of mass 5 kg , and the block B rests on a smooth horizontal table . If the minimum force that can be applied on A so that both the blocks move together is 12 N , the maximum force that can be applied on B for the blocks to move together will be :

Question

$(a)\;30\;N\qquad(b)\;25\;N\qquad(c)\;27\;N\qquad(d)\;48\;N$