Answer : 4. "Odisha"
Explanation :

Union minister Ashwini Vaishnav and ruling BJD's Debashish Samantre and Subhashish Khuntia were elected unopposed to the Rajya Sabha from Odisha. Elections are to be held on 27 February for 56 seats of the Rajya Sabha, the upper house of the parliament. Meanwhile, leaders have been elected unopposed on 41 out of 56 seats. The leaders elected unopposed include former Congress President Sonia Gandhi, BJP President JP Nadda etc.