Which of the following is the largest zone in terms of route kilometers?

The correct answer is: D. Southern Railways

Southern Railways is the largest zone in terms of route kilometers, with a total of 6,132 route kilometers. It is also the second largest zone in terms of revenue, after Northern Railways. Southern Railways is headquartered in Chennai, Tamil Nadu.

The other options are:

• A. Western Railways is the second largest zone in terms of route kilometers, with a total of 5,328 route kilometers. It is headquartered in Mumbai, Maharashtra.
• B. Eastern Railways is the third largest zone in terms of route kilometers, with a total of 4,424 route kilometers. It is headquartered in Kolkata, West Bengal.
• C. Northern Railways is the fourth largest zone in terms of route kilometers, with a total of 4,244 route kilometers. It is headquartered in New Delhi, Delhi.