Explanation: The Delhi Metro is a rapid transit system that serves the National Capital Territory of Delhi and its neighboring regions. It is one of the largest and most extensive metro systems in India, known for its efficiency and modern technology. The Delhi Metro was inaugurated in 2002 and has since expanded to cover a significant portion of the city, providing a reliable mode of public transportation.
The Delhi Metro system is a crucial part of the city's urban infrastructure, designed to alleviate traffic congestion and provide a convenient and efficient means of transportation for millions of commuters daily. It operates on a network of lines that connect various parts of the city, including major commercial, residential, and tourist areas. The system is known for its punctuality, cleanliness, and safety, making it a preferred mode of transport for many residents and visitors.
In contrast, the other cities listed in the options do not have operational metro rail services. Ranchi, a city in the state of Jharkhand, primarily relies on road transport and bus services for public transportation. Lucknow, the capital of Uttar Pradesh, is in the process of developing a metro rail system but does not have an operational service yet. Patna, the capital of Bihar, is also in the early stages of planning and development for a metro rail system, but it is not operational as of now.
Understanding the presence of metro rail services in different cities is important for students preparing for competitive examinations, as it reflects the urban infrastructure and development of various regions in India. The Delhi Metro stands out as a significant example of modern urban transportation systems in the country, showcasing the advancements in public infrastructure and urban planning.