1.
Which of the following best describes the significance of the Howrah Maidan-Esplanade metro project?
2.
The Howrah Maidan-Esplanade section of Kolkata Metro is approximately how long?
3.
What is the primary impact expected from the inauguration of the Howrah Maidan-Esplanade metro section?
4.
The underwater tunnel of the Kolkata Metro is built under which river?
5.
Which section of the Kolkata Metro, featuring India's first underwater tunnel, was inaugurated recently?