Answer : 4. "तमिलनाडु"
Explanation :

Union Youth Programme, Sports Minister Anurag Singh Thakur launched the official logo, jersey, mascot and theme song of Khelo India Youth Games in Chennai. The sixth edition of Khelo India Youth Games is scheduled from 19 to 31 January in the coming year. The upcoming edition will be held in four cities of Tamil Nadu – Chennai, Trichy, Madurai and Coimbatore. The last five editions of the Youth Games were held in Delhi, Pune, Guwahati, Panchkula and Bhopal.