This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Communicable diseases, Subject name: Social & Preventive Medicine
Annual blood smear examination rate is an indicator of - 
Select and explain. 
A. Disease rate (Prevalence), B. Operation effciency, C. % of transmission of malaria, D. Infectivity rate
B: Operation effciency
Answer: B: Operation effciency 
Explanation: Prevalence of malaria can be inspected by annual blood smear examination. REF. PARK'S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICINE 21ST EDITION. PAGE NO - 238