In which one of the following States is Pakhui Wildlife Sanctuary located?

The correct answer is A) Arunachal Pradesh. Pakhui Wildlife Sanctuary lies in Papum Pare district, close to the Assam border, and forms part of the Pakke-Nameri-Pakhui forest landscape in the eastern Himalayas. It is known for its rich avifauna, including hornbills, and for elephants and other mammals.

• Manipur is wrong. Its famous protected area is Keibul Lamjao National Park on Loktak Lake, the world's only floating national park, not Pakhui.
• Meghalaya is wrong. Its well-known protected areas include Nokrek National Park and Balpakram National Park, both in the Garo and Khasi hills region.
• Nagaland is wrong. Its sanctuaries include Intanki and Fakim, which are in Nagaland's own hill districts.

The core concept is the Wildlife (Protection) Act, 1972, which lets states notify sanctuaries, national parks and reserves. For Mains (GS-III, environment and biodiversity), this connects to the Northeast's biodiversity hotspot status and the need for landscape-level conservation across state boundaries.

Trap: Aspirants pick Nagaland or Manipur because the names sound similar to other Northeast sanctuaries. Map the landscape, not just the name. Pakhui sits with Pakke and Nameri, and that cluster is in Arunachal.