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
Good clinical practice is observed in all phases of clinical trials, EXCEPT? 
Select and explain. 
A. Preclinical, B. Phase I, C. Phase II, D. Phase V
A: Preclinical
Answer: A: Preclinical 
Explanation: None