Which of the following is NOT a PSU?

Correct option is B

BSNL is not a PSU
GAIL (Gas Authority of India Limited):
· GAIL is a Maharatna PSU (Public Sector Undertaking) in India.
· It is the largest state-owned natural gas processing and distribution company in India.
SAIL (Steel Authority of India Limited):
· SAIL is a Maharatna PSU in India.
· It is one of the largest state-owned steel-making companies in India and one of the top steel producers globally.
· SAIL operates integrated steel plants across India and is involved in the manufacturing and distribution of various steel products catering to industrial and infrastructure sectors.
ONGC (Oil and Natural Gas Corporation Limited):
· ONGC is a Maharatna PSU in India.
· It is the largest oil and gas exploration and production company in India and one of the largest in the world.