Which is the longest route train in Indian Railways ?

Options:
A) Vivek Express Dibrugarh - Kanyakumari
B) Thiruvananthapuram Central–Silchar Express
C) Himsagar Express - Jammu Tawi to Kanyakumari
D) Ten Jammu Express - Tirunelveli Jammu
 
Answer : Vivek Express Dibrugarh - Kanyakumari