There are two charges ( +2 mu C ) and ( -3 mu C ). The ratio of forces acting on them will be
(1) 2: 3
(2) 1: 1
(3) 3: 2
(4) 4: 9

( F_{Q2}^{}=frac{a_{1} Q_{1}}{a_{2}}=frac{a_{2}}{4 pi epsilon_{0} d^{2}} quad F_{Q1}=frac{a_{1} a_{2}}{4 pi_{1} b d^{2}} )
( frac{F a_{2}}{F_{21}}=frac{1}{1} )