The distance between which two cities has been reduced by the Atal Tun

The distance between which two cities has been reduced by the Atal Tunnel ?

Bagdogra to Gangtok
Jammu to Srinagar
Manali to Leh
Itanagar to Tawang
This question was previously asked in
UPSC CDS-2 – 2021
The correct option is C) Manali to Leh.
The Atal Tunnel (also known as Rohtang Tunnel) is a highway tunnel built under the Rohtang Pass in the eastern Pir Panjal range of the Himalayas on the Leh–Manali Highway. It significantly reduces the distance and travel time between Manali in Himachal Pradesh and Leh in Ladakh.
The tunnel is 9.02 km long and is the world’s longest highway tunnel above 10,000 feet. It connects Manali to Lahaul valley year-round, which was previously cut off for about six months due to heavy snowfall on Rohtang Pass. This connectivity greatly facilitates movement towards Leh.