IRIS Dena sunk off Sri Lanka

1. Question 1Answer C

   Which US submarine sank the Iranian frigate IRIS Dena off Galle, Sri Lanka, on 4 March 2026?

   • AUSS Virginia
   • BUSS Texas
   • CCorrect answer: USS Charlotte
   • DUSS Seawolf

   Core Trigger: On 4 March 2026 USS Charlotte torpedoed and sank the Iranian frigate IRIS Dena about 19 nautical miles off Galle, Sri Lanka; over eighty died.From Book 1 RATNA, topic 142, point 1

2. Question 2Answer C

   IRIS Dena was sailing home from which Indian event when it was sunk?

   • AMalabar 2026 at Guam
   • BExercise Varuna off Goa
   • CCorrect answer: MILAN 2026 and International Fleet Review
   • DDefence Expo 2026 at Gandhinagar

   India Link: The frigate was sailing home from India's MILAN 2026 exercise and International Fleet Review at Visakhapatnam.From Book 1 RATNA, topic 142, point 2

3. Question 3Answer C

   How many AH-64E Apaches does India operate?

   • A22
   • B24
   • CCorrect answer: 28
   • D36

   Key Platform: A US AH-64 Apache was downed near Hormuz; India operates 28 AH-64E Apaches.From Book 1 RATNA, topic 142, point 3

4. Question 4Answer C

   Which Iranian air defence system reportedly downed a US MQ-9 Reaper drone?

   • ABavar-373
   • BKhordad-15
   • CCorrect answer: Arash-e Kamangir
   • DSayyad-3

   Air Defence: Iran's Arash-e Kamangir air defence reportedly downed a US MQ-9 Reaper drone.From Book 1 RATNA, topic 142, point 4

5. Question 5Answer B

   The sinking was the first time since which war that a US submarine sank a warship with torpedoes?

   • AKorean War
   • BCorrect answer: Second World War
   • CVietnam War
   • DFirst Gulf War

   Historic First: It was the first time since the Second World War that a US submarine sank a warship with torpedoes.From Book 1 RATNA, topic 142, point 5

6. Question 6Answer C

   USS Abraham Lincoln belongs to which class of aircraft carrier?

   • AGerald R. Ford-class
   • BKitty Hawk-class
   • CCorrect answer: Nimitz-class
   • DAmerica-class

   Stakeholders: Iran's IRGC Mosquito Fleet of fast boats and naval mines threatened shipping; USS Abraham Lincoln is a Nimitz-class carrier.From Book 1 RATNA, topic 142, point 6

7. Question 7Answer C

   The Strait of Hormuz links the Persian Gulf with which waterbody?

   • AGulf of Aden
   • BRed Sea
   • CCorrect answer: Gulf of Oman
   • DBay of Bengal

   Venue: Galle waters, Sri Lanka; Hormuz links the Persian Gulf with the Gulf of Oman.From Book 1 RATNA, topic 142, point 8

8. Question 8Answer C

   In which year was Iran's Islamic Revolutionary Guard Corps (IRGC) formed?

   • A1971
   • B1981
   • CCorrect answer: 1979
   • D1989

   Founded: Iran's Islamic Revolutionary Guard Corps (IRGC) was formed in 1979 after the Islamic Revolution.From Book 1 RATNA, topic 142, point 9

9. Question 9Answer D

   Which provision of the UN Charter bars the use of force?

   • AArticle 2(1)
   • BArticle 33
   • CArticle 42
   • DCorrect answer: Article 2(4)

   Landmark: The UN Charter (1945) bars the use of force in Article 2(4), with self-defence preserved by Article 51.From Book 1 RATNA, topic 142, point 10

10. Question 10Answer B

    Consider UNCLOS. 1. Article 38 bars passage through straits used for international navigation. 2. Article 95 gives warships on the high seas complete immunity from other states' jurisdiction. Which is/are correct?

    • AOnly 1
    • BCorrect answer: Only 2
    • CBoth 1 and 2
    • DNeither

    Articles: Article 38 of UNCLOS gives ships the right of transit passage through straits used for international navigation.From Book 1 RATNA, topic 142, point 11

Open these answers in the app (sign-in needed)