West Champaran is the answer that matches the Bihar-specific fact asked in the question. iger Reserve is also a Ramsar wetland site. The wording of the question specifically requires the association represented by West Champaran. Option A (East Champaran) is incorrect because it does not match the specific person, district, place, institution, event or factual association asked in the question. Option B (Sitamarhi) is incorrect because it does not match the specific person, district, place, institution, event or factual association asked in the question. Option D (Gopalganj) is incorrect because it does not match the specific person, district, place, institution, event or factual association asked in the question. Thus the correct option is supported by the relevant Bihar-related historical, geographical, cultural or administrative context, whereas every distractor fails the exact person–place–event relationship. The Valmiki Tiger Reserve is located in the West Champaran district of Bihar and is the only tiger reserve in Bihar. It was established in 1990 under Project Tiger and covers an area of about 899.38 sq km. The reserve is situated on the Himalayan foothills and is surrounded by the Nepal border to the north and the Gandak river to the east. It is named after the sage Valmiki, the author of the Ramayana, who is believed to have composed the epic in this forested region. The reserve is home to tigers, leopards, elephants, gharials, and various species of birds. The Valmiki National Park (a core zone within the reserve) was established in 1976. East Champaran district is adjacent to West Champaran and is also significant (Motihari, Champaran Satyagraha), but the tiger reserve is specifically in West Champaran. Sitamarhi is associated with the birthplace of Goddess Sita (Janaki Temple). Gopalganj is a district in northwest Bihar but does not have the tiger reserve.
