<prompt> Which muscle originates from 1st pharyngeal arch?BuccinatorPosterior belly of digastricMasseterStylopharyngeus  <response>: Arch 1 : Mandibular arch Muscle derivatives Muscles of mastication temporalis, masseter, mediallateral pterygoid, mylohyoid, anterior belly of digastric, tensor veli palatini, tensor tympani Innervated by V3 of the trigeminal nerve CN5 Aoic arch 1 becomes pa of the maxillary aery 