Question : In the context of Kolkata's town planning, what was a significant change in the city's urban landscape in the 19th century?
Option 1: The introduction of the metro system
Option 2: The construction of the Howrah Bridge
Option 3: The development of the drainage system
Option 4: The establishment of new market areas
Correct Answer: The development of the drainage system
Solution : The development of the drainage system in the 19th century was a significant change in Kolkata's urban landscape, improving sanitation and public health in the city.