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: Anatomy
Diaphragm develops from all except - 
Select and explain. 
A. Septum transversum, B. Dorsal mesocardium, C. Pleuroperitoneal membrane, D. Cervical myotomes
B: Dorsal mesocardium
Answer: B: Dorsal mesocardium 
Explanation: None