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
Most sensitive indicator of recent transmission of malaria of - 
Select and explain. 
A. Infant parasite rate, B. ABER, C. Spleen rate, D. Annual parasite index
A: Infant parasite rate
Answer: A: Infant parasite rate 
Explanation: <p> Infant parasite rate. It is the percentage of infants below age of 1 year showing malaria parasites in their blood films. Reference:Park&;s textbook of preventive and social medicine,K.Park,23rd edition,page no:261. <\p>