Correct option is B
The correct answer is
(b) in as it is the most appropriate preposition to indicate location within a city like Mumbai.
Analysis:
(a) On (पर): This preposition indicates a surface or position and doesn’t fit when referring to being inside a city.
(b) In (में): This word indicates being located within a place or city, making it the correct choice.
(c) At (पर): This preposition is used to specify a particular point, but it doesn’t fit the context of a city.
(d) Over (ऊपर): This word is used to express location above something and doesn’t suit the context.
(e) Across (पार): This word means on the other side, which doesn’t fit when referring to being within a city.