Explanation:

• India and Bhutan are among 13 tiger range countries working towards TX2 (doubling the number of tigers in four years against a target of 10 years), a goal that the World Wildlife Fund (WWF) had set through the Global Tiger Initiative, Global Tiger Forum and other critical platforms.
• The award recognises a site that has achieved excellence in two or more of five themes: Tiger and prey population monitoring and research (tiger translocation/prey augmentation); effective site management; enhanced law enforcement, protection and ranger welfare improvement; community-based conservation, benefits and human-wildlife conflict mitigation and habitat and prey management.
• Transboundary Manas Conservation Area or TraMCA comprising the 500 sq. km. Manas National Park in Assam and the 1,057-sq. km. Royal Manas National Park in Bhutan have won the award.
• The Pilibhit Tiger Reserve in Uttar Pradesh also won the TX2 award for doubling its population of wild tigers since 2010.

Hence option 1st is correct.