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: Dental
Reflex which never disappear: 
Select and explain. 
A. Walking and stepping reflex, B. Limb placement reflex, C. Parachute reflex, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: None