Answer : 4. "Reserve Bank of India"
Explanation :

SEBI proposed changes in the regulatory framework for special situation funds to facilitate acquisition of stressed loans. Special situation funds (SSFs) are a sub-category of alternative investment funds (AIFs). SEBI gave other suggestions including definition of 'special status assets', eligibility of investors in SSF in the context of insolvency law. The proposals have been issued after consultation with the Reserve Bank of India (RBI), the lead regulator for sale and purchase of stressed loans in India.