Facial development takes place b/w:: (A) 4-8 week, (B) 8-l0week, (C) 12-14week, (D) 18-20week
Answer is A. Ans. a. 4-8 week Development of faceFacial development occurs mainly between 4th and 8th weeks, and is induced by migration of cells of neural crest.Five facial primordia appear as prominences of mesenchyme : a frontonasal process, a pair of maxillary processes and a pair of mandibular processes.