The following are multiple choice questions (with answers) about medical knowledge.   **Question:** All of the following are done to remove Confounding except   (A) Randomization   (B) Random Selection   (C) Matching   (D) Blinding
['(B) Random Selection <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Randomization \n (B) Random Selection \n (C) Matching \n (D) Blinding <> possible answers', '  All of the following are done to remove Confounding except <> context@']