This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Screening, Subject name: Social & Preventive Medicine
[{'content': 'L-J cha is used for monitoring- \nSelect and explain. \nA. Accuracy, B. Precision, C. Sensitivity, D. Specificity', 'role': 'user'}, {'content': 'Answer: A \nExplanation: <p> L J cha is used for monitoring of accuracy. Accuracy : degree of closeness of a measured or calculated quantity to it&;s actual ( true) value. Reference: A. Dictionary of Public Health by J Kishore,p5,410. <\\p>', 'role': 'assistant'}]