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': 'Positive forced duction test is seen in ? \nSelect and explain. \nA. Extraocular muscle palsy, B. Mechanical restriction of ocular movement, C. Concomitant squint, D. None', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Mechanical restriction of ocular movement forced duction test : Resistance encountered during passive rotation and is seen in incomitant squint due to mechanical restriction. Negative forced duction test :No resistance during passive rotation and is seen in extraocular muscle palsy", 'role': 'assistant'}]