In comparison to most large cities around the world, the city of mumbai?
a) has an older population
b) is far more densely populated
c) has a higher per capita income
d) is located in the interior of the country, rather than near water

Mumbai is one of the major city in India which known home of Bollywood.But this city is also known as one of the most populated city in the world.

The land  area of Mumbai is 604 square km. The population of Mumbai is currently almost 12.73 million. (as per civic data).

The density of the city is 26357 people per sq/km.

So the answer of the question is

b) is far more densely populated