AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.
(c) Broad Gauge
Broad Gauge (1.676 m) covers the longest route distance of 63,950 km in the Indian Railway network.
The answer is directly supported by Table 7.1 in the Railways section of Chapter 7, which clearly shows Broad Gauge has 63,950 km of route out of the total 67,956 km — far more than Metre Gauge (2,402 km) or Narrow Gauge (1,604 km).