This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Concept of health and disease, Subject name: Social & Preventive Medicine
Sputum examination for AFB is a type of 
Select and explain. 
A. Primary prevention, B. Secondary prevention, C. Teiary prevention, D. Primordial prevention
B: Secondary prevention
Answer: B: Secondary prevention 
Explanation: Sputum AFB is a diagnostic test intended for the early diagnosis and adequate treatment. Secondary prevention: an action which halts the progress of the disease at its incipient stage and prevents complications. The interventions include early diagnosis and treatment. Ref: Park's Textbook of Preventive and Social Medicine; 24th edition - Page no. 46