PM Narendra Modi has taken various measures since 2014 to boost economic growth, including cutting the corporate tax.
Air India will have to be closed down if not privatised will have "massive financial implications”, said Puri.
BPCL at the close of market on October 4 had a market capitalisation of about Rs 1.11 lakh crore.
Even a 26 per cent stake sale at this valuation would fetch the government Rs 26,500.
The government is proposing/planning to bring down its equity holding below 51 percent in select central public sector enterprises.
Government was committed to privatisation of Air India as its debt has become totally unsustainable.
Goyal said track kilometre grew from 77,609 km to 89,919 km from 1950-2014 and rose to 1,23,236 km in the past five years.
Railway Minister Piyush Goyal said 'no specific passenger train has been identified to be run by private payers so far.'
The forum of 13 unions have decided to oppose the privatisation move, said a union functionary.
Government seeks to shore up 1.05 trillion rupees (USD 15.30 billion) through stake sales in the current fiscal year.