system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
The following is true of placebo
assistant
The correct answer is  Ref-KDT 6/e p65 Placebo plays a very impoant role in the clinical trials. To know, whether the effect is produced by a drug or it is just by chance, Ada me medication known as placebo is given to the control group, placebo may or may not produce an effect in a subject