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
[{'content': 'Which of the following is not monitored in malaria surveillence now - \nSelect and explain. \nA. ABER, B. Infant parasite rate, C. Annual parasite incidence, D. Slide positivity rate', 'role': 'user'}, {'content': 'Answer: B \nExplanation: <p> Infant parasite rate is not used now in Malaria surveillance . It was used in pre eradication era for malaria surveillance. Reference:Park&;s textbook of preventive and social medicine,K.Park,23rd edition,page no:261. <\\p>', 'role': 'assistant'}]