$ABC$ is a $\Delta$le.Its area is 12sqcm and base is 6cm.The difference of base angle is $60^{\large\circ}$.If $A$ be the angle opposite to the base,then the value of $8\sin A-6\cos A$ is

Question

$(a)\;2\qquad(b)\;4\qquad(c)\;3\qquad(d)\;1$