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: Microbiology
[{'content': "Winter bottom's sign in sleeping sickness refers to- \nSelect and explain. \nA. Unilateral conjunctivitis, B. Posterior cervical lymphadenopathy, C. Narcolepsy, D. Transient erythema", 'role': 'user'}, {'content': "Answer: B \nExplanation: Sleeping sickness \n\nFever\nLoss of nocturnal sleep\nHeadache\nFeeling of oppression\nPruritis and maculopapular rashes\nWeight loss\nArthralgia\nHepatosplenomegaly\nLymphadenopathy, particularly of the posterior triangle of the neck → Winter bottom's sign", 'role': 'assistant'}]