This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Epidemiology, Subject name: Social & Preventive Medicine
[{'content': 'Good clinical practices (GCP) are not a pa of:- \nSelect and explain. \nA. Phase I Clinical Trials, B. Phase II Clinical Trials, C. Phase IV clinical trials, D. Pre - Clinical trials', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Pre - clinical trials are performed on animals (lab - experiments / lab - trials), so good clinical practices (GCP) are not required. Phase I (healthy human volunteers), Phase II, III, IV (patients) require GCP. Phase Unit of study Purpose PRECLINICAL PHASE Lab experiments Animals Pretesting CLINICAL PHASE Phase 0 Healthy human volunteers Micro - dosing Phase I Healthy human volunteers Safety and non - toxicity profile Phase II Patients Effectiveness Phase III Patients Comparison with existing drugs Phase IV Patients Long term side effects', 'role': 'assistant'}]