Explanations:The Brihanmumbai Municipal Corporation (BMC) is the municipal body responsible for the civic infrastructure of the city of Mumbai. Mumbai, being the financial capital of India, is home to a significant portion of the country's economic activities. The city is a major hub for industries, services, and financial institutions, which contribute to a high level of economic activity and, consequently, substantial tax revenues for the municipal corporation.
The economic significance of Mumbai is reflected in its diverse and robust economy, which includes sectors such as finance, information technology, entertainment, and manufacturing. The city's large population and high density of businesses generate significant revenue for the BMC through various taxes and fees, making it the richest municipal corporation in India.
Other major cities like Hyderabad and Kolkata, while economically significant in their own right, do not match the economic scale and revenue generation of Mumbai. Hyderabad, the capital of Telangana, is a growing economic hub with a focus on IT and pharmaceuticals, but it does not have the same level of economic activity as Mumbai. Kolkata, the capital of West Bengal, is a historic and cultural center with a strong industrial base, but its economic activities and tax revenues are not as high as those of Mumbai.
Therefore, the Brihanmumbai Municipal Corporation is recognized as the richest municipal corporation in India due to the city's significant economic activities, high population density, and substantial tax revenues. This makes Option B the correct answer to the question.