Both statements in this question are individually true. Statement I states that a person may suffer from tuberculosis if they frequently visit crowded places. This is true because tuberculosis is an airborne disease, and it can spread more easily in crowded places where there is close contact with infected individuals.

Statement II states that the bacteria of tuberculosis spread through droplets by sneezing or coughing. This is also true because the bacteria Mycobacterium tuberculosis, which causes tuberculosis, is primarily transmitted through droplets released by infected individuals when they cough or sneeze. These droplets contain the bacteria, and when inhaled by another person, it can lead to infection and the development of tuberculosis.

Therefore, both statements are true, and Statement II is the correct explanation of Statement I. The close contact with infected individuals in crowded places increases the chances of inhaling the droplets containing the bacteria, thus increasing the risk of tuberculosis infection.