Column I (Benzene derivative)		Column-II (Electron migration effect observed)
I)		a)	+I, +hyperconjugation
II)		b)	-I, +M
III)		c)	-I, -M

I) $-{\mathrm{NO}}_2$ group has a multiple bond between nitrogen and oxygen. It shows -I, -M effect.

II) $-{\mathrm{CH}}_3$ group is a +I group with three hyper conjugated H-atoms. It shows +I, +R effect.

III)  $-{\mathrm{NH}}_2$ group shows -I effect as it has nitrogen atom which is more electronegative than carbon.

      Since there is lone pair on nitrogen in conjugation with double bond of Benzene ring, it shows +M effect.

      Thus it shows -I, +M effect.