The Railways provide the principal mode of transportation for freight and passengers.From a modest beginning in 1853 when the first train steamed off from Mumbai to Thane a distance of 34 km it has now grown to a route length of 64460 kms. How much percent of the route length has been electrified in the last 160 years ?

• A. About 30%
• B. About 40%
• C. About 50%
• D. About 60%