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': 'True stereopsis is perceived due to the following: \nSelect and explain. \nA. Overlay of contours, B. Motion parallax, C. Bi- nasal disparity, D. Linear perspective', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. Binasal disparity', 'role': 'assistant'}]