The following are multiple choice questions (with answers) about medical knowledge.   **Question:** RNAi causes the following in a gene:   (A) Knock in   (B) Knock out   (C) Knock down   (D) Knock up
['(C) Knock down <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Knock in \n (B) Knock out \n (C) Knock down \n (D) Knock up <> possible answers', '  RNAi causes the following in a gene: <> context@']