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: Pediatrics
Opsomyoclonus is encountered as C/F of – 
Select and explain. 
A. Meningioma, B. Neuroblastoma, C. Neurofibromatosis, D. Excision
B: Neuroblastoma
Answer: B: Neuroblastoma 
Explanation: Neuroblastoma can present as paraneoplastic syndrome of autoimmune origin manifesting as ataxia or oposmyoclonus (Dancing eyes and dancing feat).
In such cases primary tumor is in the chest or abdomen and the brain is negative for tumor.
Some tumor produce catecholamines that can cause sweating and HTN and some release vasoactive intestinal peptide (VIP) causing secretary diarrhea.