As of 2022, which is the longest tunnel of Indian Railways?

As of 2022, the Pir Panjal Railway Tunnel (also known as the Banihal railway tunnel) was the longest operational railway tunnel in India, spanning a length of $11.215\text{km}$. It is located across the Pir Panjal Range of the middle Himalayas in Jammu and Kashmir on the Banihal-Qazigund section. While longer tunnels like T-49 ($12.758\text{km}$) were under construction/breakthrough phases at that point, Pir Panjal remained the longest operational link.