The correct option is C Development of bullet trains
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The railway is the cheapest mode of transportation in India. Therefore, the Indian railway network is growing at a healthy rate. The track length of the Indian railways is 99,235 kilometres. There are 13,523 passenger trains and 9,146 freight trains operating throughout India every day.
With the advancement of science and technology and the development of subways and high-speed trains, it is estimated that by 2026, the Indian railway market will become the world's third largest market in the future.