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': 'What is not a feature of paralytic squint - \nSelect and explain. \nA. Diplopia, B. Decreased visual acuity, C. Limited movement of eye ball, D. Change of head posture', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Paralytic squint usually occurs in adults when visual acuity has already been developed. Therefore amblyopia does not occur usually and visual acuity is normal.', 'role': 'assistant'}]