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
Winter bottom's sign in sleeping sickness refers to- 
Select and explain. 
A. Unilateral conjunctivitis, B. Posterior cervical lymphadenopathy, C. Narcolepsy, D. Transient erythema
B: Posterior cervical lymphadenopathy
Answer: B: Posterior cervical lymphadenopathy 
Explanation: Sleeping sickness 

Fever
Loss of nocturnal sleep
Headache
Feeling of oppression
Pruritis and maculopapular rashes
Weight loss
Arthralgia
Hepatosplenomegaly
Lymphadenopathy, particularly of the posterior triangle of the neck → Winter bottom's sign