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: Pharmacology
[{'content': 'At same concentration of steroid which of the following is most potent ? \nSelect and explain. \nA. Ointment, B. Cream, C. Lotion, D. Gel', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]