Surgery Cleft in facial region; A Non fusion of ectodermal process B Absence or deficiency of mesodermal mass or other failure to penetrate ectodermal grooves C Covering of mesoderm on both sides by ectodermal process D Failure of endodermal structures to fuse in midline 💡 Explanation Cleft in facial region; ✓ Correct Answer: B. Absence or deficiency of mesodermal mass or other failure to penetrate ectodermal grooves