Social & Preventive Medicine Which of the following statements about Clinical trials is true? A Post-marketing surveillance is done in Phase 3 B Safety and non-toxicity is evaluated in Phase 2 C Randomized controlled trial in patients is done in Phase 3 D Unit of study in Phase 1 is Patients 💡 Explanation Which of the following statements about Clinical trials is true? ✓ Correct Answer: C. Randomized controlled trial in patients is done in Phase 3