This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pharmacology, Subject name: Pharmacology
Phase 3 clinical trial is also called as 
Select and explain. 
A. Human pharmacology, B. Post marketing surveillance, C. Therapeutic exploration, D. Therapeutic confirmation
D: Therapeutic confirmation
Answer: D: Therapeutic confirmation 
Explanation: Phase 3 trial-done on 1000s of patients in various centers- multicentric, double-blinded after completion of phase 3, new drug will be released into the market Reference: Katzung's Pharmacology; 13th edition; Chapter 5; Development & Regulation of Drugs