Dear,
I already had 7 groups which I couldnot delete and I had to add and remove scrips only from 8th group for option contracts. Once you mentioned about exporting the group, I tried to export but it exported all the groups. Later I edited the exported group and retained only the 8th group and similarly i tried for 2 more groups. I felt like why I am exporting all the groups and deleting all but one,may be I am missing something;Instead there could be a way to export a single group alone. So i posted the query for the same.
However i really appreciate your kindness. Thanks again