Correct Answer: Mumbai

Solution : The correct answer is (a) Mumbai.

Mumbai, located on the western coast of India in the state of Maharashtra, is considered the financial hub of the country. It houses the headquarters of major national and international financial institutions, including the Reserve Bank of India (RBI), the Bombay Stock Exchange (BSE), the National Stock Exchange (NSE), and numerous banks, financial companies, and corporate headquarters.
Mumbai's significance as a financial center stems from its vibrant stock market, extensive banking and financial services, and its role as a major port and commercial center. It attracts professionals from various fields and is a major destination for businesses, trade, and commerce in India.