Explanation:

All statements are incorrect.

• Statement 1 is incorrect because the Zorawar Light Tank was developed indigenously by India’s Combat Vehicles Research & Development Establishment (CVRDE) in collaboration with Larsen & Toubro (L&T), with significant contributions from Indian MSMEs and industries.

• Statement 2 is incorrect because the Zorawar Light Tank is not a heavy-armoured vehicle. It weighs 25 tonnes, making it a highly mobile and versatile tank, suitable for high-altitude and challenging terrains.

• Statement 3 is incorrect because the Zorawar Light Tank is capable of being airlifted by military transport aircraft such as the C-17, which enhances its strategic mobility and deployment capabilities, especially in difficult terrains like Ladakh.

Hence option 4th is correct.