The correct answer is option 'C' - Reserve Bank of India (RBI).

The "Changemaker of the Year 2023" award at the 5th edition of The Hindu BusinessLine Changemaker Awards was received by the Reserve Bank of India (RBI). Let's explore the reasons behind this recognition:

1. The Hindu BusinessLine Changemaker Awards:
- The Hindu BusinessLine Changemaker Awards is an annual event organized by The Hindu BusinessLine, one of India's leading business newspapers.
- The event aims to recognize and honor individuals, organizations, and institutions that have made significant contributions and brought about positive change in their respective fields.

2. Changemaker of the Year Award:
- The Changemaker of the Year award is one of the prestigious categories at The Hindu BusinessLine Changemaker Awards.
- This award is bestowed upon an entity that has demonstrated exceptional transformative leadership and has brought about significant positive impact in its domain.

3. Reserve Bank of India (RBI):
- The Reserve Bank of India (RBI) is the central banking institution of India and plays a critical role in the country's financial system.
- Established in 1935, the RBI is responsible for regulating and supervising the banking sector, controlling monetary policy, issuing currency, and maintaining financial stability in India.
- The RBI's primary objective is to promote economic growth while ensuring price stability and maintaining the stability of the financial system.

4. Reasons for the Award:
- The RBI has been recognized as the Changemaker of the Year 2023 due to its exceptional efforts and initiatives in driving positive change in the Indian economy.
- The central bank has played a crucial role in implementing various reforms and policies aimed at fostering economic growth, financial inclusion, and stability.
- Some key initiatives undertaken by the RBI include the implementation of the Insolvency and Bankruptcy Code, the introduction of the Monetary Policy Committee framework, and the promotion of digital payments and financial technology.
- The RBI's proactive measures during the COVID-19 pandemic, such as providing liquidity support and regulatory relaxations, have also contributed to its recognition as the Changemaker of the Year.

In conclusion, the Reserve Bank of India (RBI) received the "Changemaker of the Year 2023" award at the 5th edition of The Hindu BusinessLine Changemaker Awards due to its significant contributions and transformative leadership in driving positive change in the Indian economy.