The correct answer is Four. The Reserve Bank of India was established on April 1, 1935, in accordance with the provisions of the Reserve Bank of India Act, 1934. The Central Office (Headquarters) of the Reserve Bank was initially established in Kolkata but was permanently moved to Mumbai in 1937. Though originally privately owned, since its nationalization in 1949, the Reserve Bank is fully owned by the Government of India. The overall direction of the RBI lies with the 21-member central board of directors, composed of: the governor; four deputy governors; two finance ministry representatives, ten government-nominated directors, and four directors who represent local boards for Mumbai, Kolkata, Chennai, and Delhi. The Government of India appoints the directors for a four-year term. The Reserve Bank of India (RBI) is India's central bank and regulatory body and is responsible for the issue and supply of the Indian rupee and the regulation of the Indian banking system. It also manages the country's main payment systems and works to promote its economic development. Additional InformationThe Reserve Bank of India (RBI) has planned to align its financial year with the center. The Central Board of Directors of the RBI recommended aligning the accounting year of RBI with the financial year of the government (April-March), from 2020-21. The preamble of RBI is to regulate the issue of Banknotes and keeping of reserves with a view to securing monetary stability in India and generally to operate the currency and credit system of the country to its advantage; to have a modern monetary policy framework to meet the challenge of an increasingly complex economy, to maintain price stability while keeping in mind the objective of growth. The Reserve Bank's affairs are governed by a central board of directors. The board is appointed by the Government of India in keeping with the Reserve Bank of India Act.