Detailed Explanation:

Answer: Option 2 — It is a scheme of RBI for reworking the financial structure of big corporate entities facing genuine difficulties.

The Scheme for Sustainable Structuring of Stressed Assets (S4A) was launched by the Reserve Bank of India on 13 June 2016 to address large stressed assets in the corporate sector. The scheme enabled deep financial restructuring of big debt-laden projects by allowing banks to convert part of the debt into equity, thereby restoring the viability of critical sectors including infrastructure.

✅ Option 2 – Correct: S4A is indeed an RBI scheme for financial restructuring of stressed corporate entities by allowing lenders to acquire equity.
❌ Option 1 – Incorrect: The scheme is not related to ecological costs of developmental schemes.
❌ Option 3 – Incorrect: S4A is not a disinvestment plan but a debt restructuring mechanism.
❌ Option 4 – Incorrect: While related to stressed assets, S4A is a separate RBI scheme, not a provision in the Insolvency and Bankruptcy Code.