Hi once again

Groups in BSE/NSE

In BSE approximately 7000 shares are listed.But tradable securities are only 2500.
In NSE approximately 2500 shares are listed.But tradable securities are only 700.
In BSE shhares are devided into many groups.
Group a: 70% shares are for good company
Group B1 : 50 % shares goes for good company
Group b2 100% shares goes for bad company
Group z 100% shares goes for bad company.
Group T Trade to trade group

Group T: Its not a parmanent group .Ashare comes to T group As the direction of SEBI.Coz this time SEBI apply some investigation on thai share.This time this share have to obey some extra rules.
One of the vital rule is:–
This share is not margin ya interday tradable.
No group are specified in NSE.