This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Light, Subject name: Social & Preventive Medicine
[{'content': 'Visible spectrum of light \nSelect and explain. \nA. 370 - 740 nm, B. 740-1140 nm, C. 200 - 370 nm, D. 200 - 370 nm', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., 370-740 nm o As perceived by the human eye; light consists of those wavelengths of electromagenatic radiation (approximately 400-700 mm) which are capable of eliciting retinal response.", 'role': 'assistant'}]