scr category details list
1)alp
2)technician signal grade iii
3)Telcom maintenaier gr.iii
4)technican deisel/mech gr.iii(IT & Electronics &system mainteince)
5)etc...
more...
6)etc
7)etc
till 12 or 15 category
so choose atleast 8 which fits u ok
and nfr category may differnt so choose alp first option manidtory if u opt alp