This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
In a given population, prevalence of a disease can be rapidly determined by - 
Select and explain. 
A. Case control study, B. Cross over study, C. Cross sectional study, D. Double blind study
C: Cross sectional study
Answer: C: Cross sectional study 
Explanation: None