In the context of independent India's economy, which one of the following was the earliest event to take place?

1. The question asks for the earliest event to take place in the context of independent India's economy. 2. Enactment of Banking Regulation Act: This Act was passed in 1949, providing the framework for regulating banks in India. 3. Introduction of First Five-Year Plan: The First Plan covered the period 1951-1956. 4. Nationalisation of State Bank of India: The State Bank of India was created by nationalizing the Imperial Bank of India in 1955. 5. Nationalisation of Insurance companies: Life insurance companies were nationalized to form LIC in 1956. 6. Comparing the dates, the Enactment of Banking Regulation Act in 1949 was the earliest event.