Step 1: Understanding the Concept:
The Reserve Bank of India (RBI) is India's central bank and regulatory body responsible for the regulation of the Indian banking system. Its headquarters, also known as the Central Office, is where the Governor sits and where policies are formulated.
Step 2: Detailed Explanation:
The Reserve Bank of India was established on April 1, 1935. Its Central Office was initially established in Calcutta (now Kolkata). However, it was permanently moved to Bombay (now Mumbai) in 1937.
Therefore, the current headquarters of the RBI is in Mumbai, Maharashtra.
Step 3: Final Answer:
The headquarters of the Reserve Bank of India is located in Mumbai. The correct option is (B).