Explanation: Mumbai, the largest city in India, is known for its extensive public transportation network, which includes both a metro rail and a monorail system. The metro rail system in Mumbai is a rapid transit system that was inaugurated in 2014. It is designed to provide fast and efficient transportation within the city, connecting various important areas and reducing traffic congestion. The metro rail system in Mumbai is part of the larger urban transport infrastructure that aims to improve the mobility of the city's residents and visitors.
In addition to the metro rail, Mumbai also has a monorail system. The monorail is a single-rail system that operates on elevated tracks, providing a unique and eco-friendly mode of transport. The monorail system in Mumbai was also inaugurated in 2014 and serves as a supplementary mode of transportation, complementing the metro rail and other forms of public transport.
It is important to note that while other major cities in India, such as Delhi and Kolkata, have metro rail systems, they do not have monorail systems. Delhi's metro rail system is one of the largest and most extensive in India, but it does not include a monorail. Similarly, Kolkata's metro rail system, which was inaugurated in 2014, does not have a monorail component.
The presence of both a metro rail and a monorail system in Mumbai highlights the city's commitment to developing a comprehensive and diverse public transportation network. This dual system helps to cater to the diverse needs of the city's population and provides multiple options for efficient and eco-friendly travel.
In conclusion, the correct answer is Mumbai because it is the only city among the options that has both a metro rail and a monorail system, making it a unique case in the context of urban transportation in India.