This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Non-Communicable Diseases, Subject name: Social & Preventive Medicine
[{'content': 'Under NPCB, screening of school children is first done by \nSelect and explain. \nA. School teachers, B. Village health guide, C. Ophthalmologic assistant, D. Medical officer', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e. School teachers Under the National Programme for Control of Blindness, all children aged 10-14 years will be screened for refractive errors by trained teachers.Children who cannot read the 6/9 line with any eye are then sent to the ophthalmic assistant of the CHC for refraction test.Children needing spectacles are then provided free spectacles by opticians who have been contracted by the NPCB.", 'role': 'assistant'}]