Q. Which country supplies S-400 air defence missile system to India?
Answer:
Russia
Notes: Russia will begin supplying India with the third squadron of the S-400 air defence missile system in January or February of next year.
India has already deployed its first two missile system squadrons to patrol the Ladakh sector, West Bengal's Chicken's Neck Corridor and the entire north-eastern region. India and Russia have agreed to a three-year ₹35,000 crore deal to buy five squadrons of S-400 air defence missiles.