Q.

The I.E1 among the group 13 member follows as

1 B>Al>Ga<Tl<In  
2 B>Ga>Al>Tl>In  
3 B>Tl>Ga>Al>In  
4 Al>Ga>Tl>B>In  

Ans.

(3)

I.E.  B>Tl>Ga>Al>In