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': 'Inhaled sodium cromoglycate - \nSelect and explain. \nA. Prevents the antigen antibody combination, B. May cause cardiac arrhythmias, C. Is of benefit in preventing exercise induced bronchial spasm, D. Is effective in alleting an acute episode of allergic asthma', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Is of benefit in preventing exercise induced bronchial spasm", 'role': 'assistant'}]