Mandible is derived from ?
Ans. is 'a' i.e., Meckle's cailageEach half of the mandible ossifies from only one centre which appears at about the 6th week of intrauterine life in the mesenchymal sheath of Meckels cailage near the future mental foramen. Meckle's cailage is the skeletal element of first pharyngeal arch.
Meckle's cailage
Ritchers cailage
4th Pharyngeal pouch
6th Pharyngeal pouch