Which country became the 25th country to receive observer status in the World Trade Organization (WTO)?

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Which country became the 25th country to receive observer status in the World Trade Organization (WTO)?

A. Iran
B. Kazakhstan
C. Turkmenistan
D Uzbekistan

After receiving the observer status from WTO, Turkmenistan has become the last former Soviet republic to establish formal ties with the trade body. Turkmenistan has become the 25th observer of the organization.