The correct answer is option 'B' - Mumbai.

Explanation:
The question asks about the city to which the Lecturer specialized in Economics belongs. We are given two options - Hyderabad and Mumbai. We need to determine the correct city based on the available information.

To begin with, let's analyze the given options:

a) Hyderabad: This option suggests that the Lecturer specialized in Economics belongs to Hyderabad. However, there is no information provided in the question that supports this option. Therefore, we cannot conclude that the Lecturer belongs to Hyderabad based on the given data.

b) Mumbai: This option suggests that the Lecturer specialized in Economics belongs to Mumbai. Since this option is given as the correct answer, it implies that there is information available in the question that supports this option.

c) Neither Hyderabad nor Mumbai: This option suggests that the Lecturer specialized in Economics does not belong to either Hyderabad or Mumbai. Again, there is no information provided in the question that supports this option. Hence, we cannot select this option based on the given data.

d) Cannot be determined as data are inadequate: This option suggests that the data provided in the question is insufficient to determine the city to which the Lecturer specialized in Economics belongs. However, based on the given options and the fact that option 'B' is selected as the correct answer, it can be concluded that the data is adequate to determine that the Lecturer belongs to Mumbai.

In conclusion, based on the given data, the correct answer is option 'B' - Mumbai.