State Bank of India has outstanding 50,000; 10% Debentures of Rs 100 each issued in 2012 and due for redemption on 30th June 2022. How much amount of Debenture Redemption Reserve should be created before the redemption of debentures?

No requirement of creating DRR

Debenture Redemption Reserve (DRR) requirements in India vary depending on the type of financial institutions and companies. The following categories have specific rules:
Financial Institutions Registered by Reserve Bank of India: All-India financial institutions, as regulated by the Reserve Bank of India (RBI), are exempt from creating a DRR. They have the flexibility to redeem debentures using their capital.
Banking Companies: Banking companies, including those registered with RBI, are also exempt from creating a DRR. They can redeem debentures using their capital.
Non-Banking Financial Companies (NBFCs) Registered with RBI: Similarly, NBFCs registered with RBI enjoy the exemption from establishing a DRR. They can use their capital for debenture redemption.
Housing Finance Companies Registered with the National Housing Bank: Housing finance companies under the oversight of the National Housing Bank (NHB) are exempt from DRR requirements and can utilize their capital for debenture redemption.
Companies Listed on Stock Exchanges: Companies listed on stock exchanges are exempt from DRR obligations and can redeem debentures using their capital.
Unlisted Companies (excluding the above categories): For other unlisted companies, the DRR should be maintained at a level of ten percent of the outstanding debentures' value.