Which of the following statements is incorrect about the Indian Railways?

Metro rail has revolutionalised the rural transport system in India.

The correct answer is Option 3: Metro rail has revolutionalised the rural transport system in India.

Metro rail systems operate in urban areas like Delhi, Mumbai, and Bengaluru, and are designed to improve city transport. They have not impacted rural transport, which mainly depends on roads, buses, and conventional railways.

Why other options are correct:

• Option (1): Gauge conversion to broad gauge is an ongoing and important programme.
• Option (2): Steam engines have largely been replaced by diesel and electric engines.

NCERT: Indian Railways has launched an extensive programme to convert the metre and narrow gauges to broad gauges. Moreover, steam engines have been replaced by diesel and electric engines. This step has increased the speed, as well as, the haulage capacity. The replacement of steam engines run by coal has also improved the environment of the stations. Metro rail has revolutionalised the urban transport system in India.