This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Infection, Subject name: Medicine
[{'content': 'A 10-year-old school girl has recurrent episodes of boils on the scalp. The boils subside with antibiotic therapy but recur after some time. The most likely cause of the recurrences is - \nSelect and explain. \nA. Primary immunodeficiency syndrome, B. Juvenile diabetes mellitus, C. Pediculosis capitis, D. HPV infection', 'role': 'user'}, {'content': "Answer: C \nExplanation: Signs & symptoms. A ticklish feeling on the scalp or neck. An itchy scalp (the result of an allergic reaction to the bug's saliva). Small red bumps on the scalp, neck and shoulders. The presence of lice on the scalp. The presence of nits (lice eggs) on shafts of hair. Difficulty sleeping, which can lead to irritability Ref Harrison20th edition pg 1109", 'role': 'assistant'}]