Which of the following statements best describes the term 'Scheme for Sustainable Structuring of Stressed Assets (S4A)', recently seen in the news?

S4A was an RBI framework announced in June 2016 for large borrower accounts, typically those with debt above Rs 500 crore, where the company or project was viable but its debt was too heavy for its cash flows. Lenders split the loan into a sustainable part, which the borrower could service from its cash flows, and an unsustainable part, which was converted into equity or optionally convertible redeemable preference shares. Option B captures this: a restructuring tool for big corporates facing genuine difficulties.

The other options fail on identification. A describes an environmental or ecological cost assessment, not a financial scheme. C is about selling government stake in CPSEs, which is a disinvestment matter. D is wrong because S4A was an RBI circular, not a provision of the Insolvency and Bankruptcy Code, 2016, which works through NCLT and the Insolvency and Bankruptcy Board of India.

Core concept: the twin balance sheet problem and NPA resolution, which links to Mains GS-3 on banking reforms and stressed assets. RBI withdrew S4A in February 2018 and moved to a new resolution framework, so treat it as a historical instance today.

Trap: aspirants pick D because the scheme sounds like a bankruptcy provision. It was an RBI debt restructuring tool, not part of IBC.