This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: AIIMS 2018, Subject name: Pathology
Malignant peripheral nerve sheath tumour showing which of the following differentiation is termed as "Triton tumour"? 
Select and explain. 
A. Glandular, B. Rhabdomyoblastic, C. Cailaginous, D. Osseous
B: Rhabdomyoblastic
Answer: B: Rhabdomyoblastic 
Explanation: An interesting phenomenon observed in malignant peripheral nerve sheath tumour (MPNST) is described as "divergent differentiation." This term refers to the presence of focal areas that exhibit other lines of differentiation, including glandular, cailaginous, osseous (bone), or rhabdomyoblastic (striated muscle) morphology. MPNST exhibiting the rhabdomyoblastic differentiation is referred to as Triton tumour. Most MPNSTs (approximately 85%) are high-grade tumors. Most are associated with larger peripheral nerves in the chest, abdomen, pelvis, neck, or limb-girdle. Typical cases show a fasciculated arrangement of spindle shaped tumour cells.