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: Pharmacology
Which of the following is true of 'placebo' ? 
Select and explain. 
A. Placebo is a dummy medication, B. Placebo is the inert material added to the drug for making tablets, C. Placebos do not produce any effect, D. All patients respond to placebo
A: Placebo is a dummy medication
Answer: A: Placebo is a dummy medication 
Explanation: None