Detailed Explanation:

Answer: Option 3 — 2 and 5

The Organization of Turkic States (OTS), formerly known as the Turkic Council, is an intergovernmental organization promoting cooperation among Turkic-speaking nations. Among the listed countries, only Azerbaijan (founding member) and Uzbekistan (joined 2019) are full members of the OTS.

✅ Statement 2 – Correct: Azerbaijan is a founding member of the Organization of Turkic States, established in 2009.
✅ Statement 5 – Correct: Uzbekistan became a full member of the Organization of Turkic States in 2019.
❌ Statement 1 – Incorrect: Armenia is not a member of the Organization of Turkic States; it is predominantly an Indo-European nation with Armenian ethnicity.
❌ Statement 3 – Incorrect: Croatia is not a member of the Organization of Turkic States; it is a Slavic European nation and EU member.
❌ Statement 4 – Incorrect: Romania is not a member of the Organization of Turkic States; it is a Romance-speaking European nation.

📝 Short Notes: Organization of Turkic States

• Established: October 2009 as the Turkic Council; renamed Organization of Turkic States in November 2021
• Full Members (5): Azerbaijan, Kazakhstan, Kyrgyzstan, Turkey, and Uzbekistan
• Observer States (3): Hungary, Turkmenistan, and Turkish Republic of Northern Cyprus
• Objective: Promote comprehensive cooperation among Turkic-speaking states in political, economic, cultural, and security spheres
• Secretariat: Located in Istanbul, Turkey
• Common Heritage: Based on shared Turkic linguistic, cultural, and historical ties