In a major boost to defense indigenization, India signed a landmark strategic partnership agreement in 2026, often hailed as the most significant defense deal of the decade. With which country was this agreement signed, and what was its primary focus?

1. ARussia, for the joint development of a hypersonic glide vehicle.
2. BIsrael, for the co-production of the 'Iron Dome' air defence system.
3. CFrance, for the joint development and manufacturing of a new generation of fighter jet engines for the AMCA program.
4. DUnited Kingdom, for the design and construction of nuclear-powered attack submarines.