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: Physiology
Salivation by dog saw when food is given along with ringing of the bell is 
Select and explain. 
A. Conditioned reflex, B. Reinforcement, C. Habituation, D. Innate reflex
D: Innate reflex
Answer: D: Innate reflex 
Explanation: In the given scenario, there is no prior learning process involved. When the dog sees food, salivation occurs. So it is an innate response. 
If the dog salivates when the bell is ringing, after a conditioning process, then it is conditioned reflex.