Which of the following statements is correct?

a- The Atal Tunnel is built in the Zaskar range of the Himalayas.

b- The World’s longest Highway tunnel.

Only statement b is correct.

The World’s longest Highway tunnel — Atal Tunnel (9.02 Km) has been built by Border Road Organisation.  This tunnel connects Manali to Lahaul-Spiti valley throughout the year. Earlier the valley was cut off for about 6 months each year owing to heavy snowfall. The Tunnel is built with ultra-modern specifications in the Pir Panjal range of Himalayas at an altitude of 3000 metres from the Mean Sea Level (MSL).