This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anesthesia, Subject name: Pharmacology
[{'content': 'All of the following can aggravate Myasthenia gravis except \nSelect and explain. \nA. Azathioprine, B. d-Tubocurarine, C. Tetracycline, D. Aminoglycoside', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Essentials of medical pharmacology, seventh edition, page no 864, Answer is option 1, Azathioprine This antipurine acts by getting conveed to 6-MP,but has more prominent immunosuppresant action. It mainly supresses cell mediated iimmunity and is mainly used in autoimmune diseases like rheumatoid ahritis, myasthenia gravis, ulcerative collitis etc.', 'role': 'assistant'}]