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
Most sensitive index for the recent malarial transmission is 
Select and explain. 
A. Spleen rate, B. Infant Parasite rate, C. Parasite Rate, D. Slide Falciparum rate
B: Infant Parasite rate
Answer: B: Infant Parasite rate 
Explanation: None