In which one of the following places is the headquarters of the North-Eastern Railway located?$?

In which one of the following places is the headquarters of the North-

1.	In which one of the following places is the headquarters of the North-Eastern Railway located?$?
A.	Guwahati
B.	Gorakhpur
C.	Kolkata
D.	Bhubaneswar
Answer» C. Kolkata