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': 'All of the following statements regarding mast cells are true except - \nSelect and explain. \nA. They contain heparin proteoglycan, B. Their number is increased in patients with bronchial asthma, C. Disodium cromoglycate brings about their degranulation, D. They receptors for Fe portion of IgE', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]