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
The most common malignant neoplasm of infancy is – 
Select and explain. 
A. Malignant teratoma, B. Neuroblastoma, C. Wilms' tumor, D. Hepatoblastoma
B: Neuroblastoma
Answer: B: Neuroblastoma 
Explanation: Neuroblastoma is the most frequently diagnosed neoplasm in infants accounting for 28-39% of neonatal malignancies' - Nelson.
Neuroblastoma 

Neuroblastoma is a malignant tumor of the autonomic nervous system.
It has following peculiarities : -
Most common abdominal cancer of childhood.
Most common cancer of infancy
Most common extra cranial solid tumor of childhood (most common solid tumor of childhood is brain tumor).
It is a neuroendocrine tumor, arising from any neural crest element of the sympathetic nervous system.
Primary tumor is localized in the localization of sympathetic nervous system.