The following are multiple choice questions (with answers) about medical knowledge.   **Question:** While assessing the efficacy of a newly developed drug in comparison to placebo, the 95% confidence interval in clinical trials is used to check for:   (A) Efficacy of the drug   (B) Non-efficacy of the drug   (C) Both efficacy and non-efficacy of the drug   (D) Either efficacy or non-efficacy of the drug
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