Assam and _________ have signed the 'Namsai Declaration' in a step towards resolving their seven-decade old boundary dispute.

The correct answer is Arunachal Pradesh. Key Points Assam & Arunachal Pradesh on 15 July 2022 signed the 'Namsai Declaration' in a step toward resolving their seven-decade-old boundary dispute. It was signed at Namsai in Arunachal Pradesh between chief minister Pema Khandu and his Assam counterpart Himanta Biswa Sarma. They agreed to restrict the number of contested villages to 86 instead of 123. The two states share an 804-km long boundary. Additional Information ​Arunachal Pradesh is a state in Northeastern India. It was formed from the erstwhile North-East Frontier Agency region and became a state on 20 February 1987. It borders the states of Assam and Nagaland to the south. ​Arunachal Pradesh: Capital: Itanagar Governor: Lt Gen Kaiwalya Trivikram Parnaik Chief Minister: Pema Khandu Population: 12.6 lakhs (2012) State animal: Gayal Assam is a state in Northeastern India. Assam is known for Assam tea and Assam silk. The state was the first site for oil drilling in Asia. The state is bordered by Bhutan and Arunachal Pradesh to the north. Assam: ​ Capital: Dispur Governor: Shri Gulab Chand Kataria Chief Minister: Himanta Biswa Sarma Population: 3.09 crores (2012) State animal: Indian rhinoceros