Which of the following muscles of mastication originate from the zygomatic arch and is inserted at the external surface of the mandible?
  1. Masseter
  2. Temporalis
  3. Medical pterygoid
  4. Lateral pterygoid
Explanation
Answer: A - Masseter originates from the zygomatic arch and is inserted at the external surface of the mandible. Its basic function is closing the jaw.
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