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: Social & Preventive Medicine
[{'content': 'As per WHO guidelines, iodine deficiency disorders are endemic in the community when prevalence of goitre in school age children is more than – \nSelect and explain. \nA. 1%, B. 5%, C. 10%, D. 15%', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]