Which of the following muscles arise from the second pharyngeal arch mesoderm?
  1. masseter
  2. mylohyoid
  3. stapedius
  4. stylopharyngeus
Explanation
Answer: C - The stapedius, posterior digastric, and stylohyoid muscles, as well as the muscles of facial expression arise from the mesoderm of the second pharyngeal arch, and all are innervated by the facial nerve.
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