Answer : 3. "Pakistan"
Explanation :

The second edition of the joint naval exercise, Zair-al-Bahr, between the Indian Navy and Qatar Emiri Naval Force (QENF) was conducted in the Persian Gulf between August 9 and 14, 2021. It consisted of a three-day port phase followed by a two-day sea phase. Indian Navy's stealth frigate INS Trikand, MRTP 34 class fast-attack crafts and Rafale fighter aircraft participated. Exercises during the port phase included cross deck visits, professional interactions between experts and official visits. The maritime phase consisted of tactical maritime exercises including surface operations, anti-piracy exercises, air defence, maritime surveillance, boarding operations and SAR exercises.