Answer : 4. "2003"
Explanation :

The Electricity Act 2003: It is an Act of the Parliament of India enacted to transform the power sector in India. It is an act to consolidate the laws relating to the generation, transmission, distribution, trading and use of electricity and generally for taking measures conducive to the development of the electricity industry, promoting competition therein, protecting the interest of consumers and supply of electricity to all areas, rationalization of electricity tariff, ensuring transparent policies regarding subsidies, promotion of efficient and environmentally benign policies. This act was amended in 2007 and was introduced in Lok Sabha on August 8, 2022.