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
All are neural plate inducers except 
Select and explain. 
A. Notochord appearance, B. High BMP, C. FGF upregulation, D. Prechordal mesoderm
B: High BMP
Answer: B: High BMP 
Explanation: B i.e. High BMP