“India acquired the S-400 Triumf air defense system from:”

"India acquired the S-400 Triumf air defense system from:"
Answer: "Russia"

"India procured the S-400 Triumf an advanced air defense missile system from Russia to bolster its military capabilities. Signed in 2018 the deal reflects the long-standing defense partnership between the two nations. The S-400 capable of intercepting aircraft and missiles enhances India’s strategic deterrence particularly in response to regional security challenges. Despite international concerns including U.S. sanctions risks India prioritized this acquisition to strengthen its air defense infrastructure underscoring the system’s critical role in modern warfare and regional power dynamics."