This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Peripheral Nerve & Muscles, Subject name: Medicine
[{'content': 'Myasthenia gravis is caused by dysfunction of - \nSelect and explain. \nA. Pineal gland, B. Thymus gland, C. Pituitary gland, D. Parathyroid gland', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Thymus gland o Thymus is believed to play an important role in autoimmune dysfunction in myasthenia gravis.o Myasthenia gravis is a disease of the neuromuscular junction in which antibodies are formed against the nicotinic Ach receptors. The thymus is an important site for immune function and myasthenia gravis probably originates in the thymus gland. Myasthenia gravis patients have high incidence of thymic abnormalities.", 'role': 'assistant'}]