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: Medicine
[{'content': "Foster's test is used in the diagnosis of- \nSelect and explain. \nA. Spastic type of cerebral palsy, B. Hypotonic CP, C. Choreo athetotic CP, D. Myasthenia gravis", 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]