Correct Answer: (c) 2 and 5
Solution:The Organization of Turkic States was established in the year 2009 as an intergovernmental organization. Its purpose is to promote wider cooperation among the Ottoman states. Its four founding members are Azerbaijan, Kazakhstan, Kyrgyzstan and Turkiye. It may be noted that in october, 2019 during the seventh conference of the organization in Baku, the capital of Azerbaijan, Uzbekistan joined as a full member. Thus option (c) is correct.