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
Sacro - coccygeal teratoma tumour cells consists of Cells of 
Select and explain. 
A. Ectoderm, B. Endoderm, C. Mesoderm, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Sacro - coccygeal teratoma arises from totipotent Cells from node of Hensen. Hence it is composed of all 3 germ Cells i.e , Ectoderm, Endoderm , Mesoderm.