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: ENT
[{'content': "A case of bell's palsy on steroids, shows no improvement after two weeks. Next step in manangement is: \nSelect and explain. \nA. Vasodilators and ACTH, B. Physiotherapy, C. Steroids dose, D. Electrophysiological Nerve testing", 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]