Following became irrelevant with time. Private players took away all the share, driving them to obsolescence.
Air India - Aviation
BSNL/ MTNL- Telecom
Sail- Steel
Hindustan Antibiotics - Pharma
Now presently following sectors in transition
PSU Banks - Banking
Coming Up
- PSU Insurers - Insurance
- Oil PSUs- will be taken over by Tata Power, Adani Green etc.