Darjeeling Mandarin orange belongs to which state that has been granted a GI tag?

In which of the following states is the Dudhwa Tiger Reserve located, where the rainbow water snake was found for the first time in its buffer area? 

Which death anniversary of Dr. Bhimrao Ambedkar, the principal architect of the Indian Constitution, was observed on December 6, 2025?

Which of the following has won the Under 12 Asian Chess Champion title at the Asian Youth Chess Championship 2025 held in Thailand?

On which of the following days is Human Rights Day celebrated every year?