The following are multiple choice questions (with answers) about medical knowledge.   **Question:** The weakest part of the pharynx is   (A) Sinus of morgagni   (B) Between thyropharyngeal and cricopharyngeal sphincter   (C) Piriform fossa   (D) Pharyngeal recess
['(B) Between thyropharyngeal and cricopharyngeal sphincter <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Sinus of morgagni \n (B) Between thyropharyngeal and cricopharyngeal sphincter \n (C) Piriform fossa \n (D) Pharyngeal recess <> possible answers', '  The weakest part of the pharynx is <> context@']