Answer: Orang National Park
Notes: Orang National Park is the oldest game reserve in Assam. It was declared a Tiger Reserve in 2016. Kaziranga National Park and Manas National Park were declared Tiger Reserves earlier. Dibru-Saikhowa National Park was designated a Biosphere Reserve in 1997 but is not the oldest game reserve. The declaration of Orang as a Tiger Reserve was notified by the Ministry of Environment and Forests, Government of India in 2016.
