Answer : 2. "छत्तीसगढ"
Explanation :

Udanti Sitanadi Tiger Reserve, which was recently in the news due to encroachment related issues, is located in the state of Chhattisgarh. The tiger reserve located in Gariaband district of Chhattisgarh has faced challenges due to illegal encroachment in its buffer area. After a legal battle, the Chhattisgarh High Court ordered the removal of encroachers from the reserve, where the court rejected the petition filed by the encroachers. The action was based on evidence, including ISRO satellite imagery, which showed that the encroached area was once densely forested until 2012. This issue has highlighted the challenges faced by wildlife sanctuaries in India in the context of illegal encroachment and the need for vigilant conservation efforts.