<prompt> 1st pharyngeal arch gives rise to all exceptMedial pterygoidsLevator veli palatiniLateral pterygoidsTensor veli palatini  <response>: All soft palate muscles except tensor veli palatini are derived from the 4th pharyngeal arch and are supplied by vagal plexus. First pharyngeal arch gives rise to : Muscles of mastication temporalis, masseter, lateral and medial pterygoids Mylohyoid Anterior belly of digastric Tensor tympani Tensor veli palatini and Anterior 23rd of tongue. Ref: Langmans Medical embryology 13th edition PGno: 239 