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: Dental
The cumulative effect of disease past and present upto the time of examination is termed 
Select and explain. 
A. Incidence, B. Prevalence, C. Occurrence, D. Experience
B: Prevalence
Answer: B: Prevalence 
Explanation: None