<prompt> Philthrum is derived from-Maxillary processMandibular processMedial nasal processLateral nasal process  <response>: Ans. C. Medial nasal processFrontonasal process is divided into:-i Lateral nasal processes:From alae of nose.ii Medial nasal processes:These merge with each other to form intermaxillary segment which gives rise to : philtrum middle pa of upper lip,premaxillary plate. 