The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Pharyngeal arches are rod like thickning of:   (A) Endoderm.   (B) Ectoderm.   (C) Mesoderm.   (D) All of the above.
['(C) Mesoderm. <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Endoderm. \n (B) Ectoderm. \n (C) Mesoderm. \n (D) All of the above. <> possible answers', '  Pharyngeal arches are rod like thickning of: <> context@']