input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Major mechanism of transport of drugs across biological membranes is by ?   (A) Passive diffusion   (B) Facilitated diffusion   (C) Active transport   (D) Endocytosis
output: ['(A) Passive diffusion <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Passive diffusion  (B) Facilitated diffusion  (C) Active transport  (D) Endocytosis <> possible answers', '  Major mechanism of transport of drugs across biological membranes is by ? <> context']