India procured the S-400 Triumf air defense missile system from:

India procured the advanced S-400 Triumf air defense missile system from Russia. This deal, signed in 2018, is a cornerstone of India's defense modernization efforts, significantly enhancing its air defense capabilities against various aerial threats. The S-400 is a highly sophisticated system known for its long-range and multi-target engagement capabilities, making Russia a crucial strategic defense partner for India.

• UK, Germany, and US are also major arms exporters, but the S-400 system is exclusively manufactured and supplied by Russia, making them incorrect options for this specific procurement.