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: Ophthalmology
[{'content': 'Rhodopsin has a peak sensitivity to light of wavelength: \nSelect and explain. \nA. 100 nm, B. 355 nm, C. 505 nm, D. None of the above', 'role': 'user'}, {'content': "Answer: C \nExplanation: The photosensitive pigment in the rods is called rhodopsin (visual purple). Its opsin is called scotopsin. Rhodopsin has a peak sensitivity to light at a wavelength of 505 nm. Ref: Ganong's Review of Medical Physiology 23rd edition, Chapter 12.", 'role': 'assistant'}]