Which one of the following statements is not correct?

Statement 4 is incorrect because the Sukhoi-30 MKI fighter is manufactured in India by Hindustan Aeronautics Limited (HAL) under a licensed production agreement with Russia's Sukhoi, not by the Defence Research and Development Organization (DRDO) [1]. DRDO is primarily a research and development agency, while HAL is the state-owned aircraft manufacturer. Statements 1 and 2 are correct; BrahMos is a supersonic cruise missile developed as a joint venture between India's DRDO and Russia's NPO Mashinostroyenia, with its name derived from the Brahmaputra and Moskva rivers. Statement 3 is also correct, as Indian scientists and engineers from HAL and BrahMos Aerospace successfully modified and integrated the air-launched version of the missile with the Su-30 MKI, a significant technological milestone achieved through indigenous efforts.

Sources

1. [1] Indian Economy, Vivek Singh (7th ed. 2023-24) > Chapter 7: Indian Economy after 2014 > Challenges faced by the "Make in India" Initiative > p. 231