Correct option is A
PM Modi inaugurated the world’s longest twin-lane tunnel, ‘The Sela Tunnel’, in Tawang, ‘Arunachal Pradesh.
The Sela tunnel was announced by the government in 2018.
It is a part of the Balipara-Charduar-Tawang road, one of the key strategic projects near the Chinese border.
It cuts through the Sela–Charbela ridge, which separates the Tawang district from the West Kameng district.
It is located in the West Kameng and Tawang districts of Arunachal Pradesh.
The Border Roads Organisation is executing the tunnel under Project Vartak.
This will be the longest twin-lane tunnel above 13,000 feet in the world.
It provides all-weather connectivity to Tawang across Sela Pass on the Balipara-Chariduar-Tawang (BCT) Road, which connects Tezpur in Assam to Tawang in Arunachal Pradesh.
It boosts India’s operational preparedness along the LAC and aids in quick military mobilisation to the bordering Tawang sector.