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': 'The normal extent of temporal field of vision for white colour is about: \nSelect and explain. \nA. 60deg, B. 80deg, C. 90deg, D. 110deg', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. 90deg', 'role': 'assistant'}]