Article Detail Which is Largest railway route in India ? Answer: Dibrugarh in Assam to Kannyakumari in Tamil Nadu. Similar Questions : 1. Which is Longest road tunnel in the World ? Answer: Lærdal Tunnel (Norway - 24.51 kilometre) 2. Which is the smallest state of India by Population ? Answer: Sikkim 3. Which is longest river of South India ? Answer: Godavari 4. Which is smallest state by area of India ? Answer: Goa 5. What is the name of brightest star ? Answer: Sirius 6. Which is largest Delta of India ? Answer: Sundarban (W. Bengal) 7. Which is the Highest mountain peak ? Answer: Mount Everest (8,850 m) Read more from - Longest and Largest