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
Cource of a disease process without any' intervention is the definition of - 
Select and explain. 
A. Spectrum of disease, B. Epidemiology of disease, C. Natural history of disease, D. Iceberg phenonenon
C: Natural history of disease
Answer: C: Natural history of disease 
Explanation: Ans. is 'c' i.e., Natural history of disease o Natural history of disease signifies the way in which a disease evolves over time from the earliest stage of its prepathogenesis phase to its termination as recovery, disability or death, in the absence of treatment or prevention.