Why not 2,1,3 because there are two line pairs on two nitrogens h h) n 6) h h

see there is no confusion in second one as there are two nitrogen and at one point of time only one nitrogen will donate.

Inductive effect is respective in nature mean if two same group in a compound present then one show +I and another show -I. here in case of II, one N show -I effect on another N so...

At any instant or at one time it can donate only one lone pair and other gives -I effect