Explanation:

Jiribam-Imphal Railway

• Sanctioned in February 2005 as a national project, the 110.625 km Jiribam-Imphal line is considered a vital segment of the Trans-Asian Railway envisaged as an integrated freight railway network across Europe and Asia.
• The broad-gauge project entails connecting Manipur’s Jiribam, a town on the border with Assam, and the State capital Imphal mostly across the fragile hills of Noney district is expected to reduce the travel time from the existing 10-12 hours to three hours.
• The project involves 46 tunnels with a total length of 61.398 km, 16 road overbridges, and under-bridges, and 140 major and minor rail bridges.
• Tunnel number 12 on this line is India’s longest railway tunnel at 11.55 km and one of the rail bridges near Noney is being built at a pier height of 141 meters, the world’s tallest.
• India’s northeast comprising Manipur and seven other States is the sixth most earthquake-prone belt in the world.

Hence only statement 1st is correct.