In a double-blind clinical drug trial:: (A) Each patient receives a placebo, (B) Each patient receives both (double) treatments, (C) The patients do not know which treatment they are receiving, (D) The patients do not know that they are in a drug trial
Answer is C. The double blind trial is so planned that neither the doctor nor the paicipant is aware of the group allocation and the treatment received. Ref: 25th edition, Park's Textbook of Preventive and Social Medicine, Page no. 91