This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
Which out of the following bones ossify first? 
Select and explain. 
A. Mandible, B. Nasal bone, C. Vomer, D. Occipital
A: Mandible
Answer: A: Mandible 
Explanation: Mandible is the second bone, next to clavicle, to ossify in the body. 
It ossifies in membrane in its greater part. Each half of the body of mandible is ossified in membrane from 1 centre, which appears during 6th week I.U. near future mental foramen.
The parts ossifying in cartilage includes,
	
Incisive part, below the incisor teeth.
Upper half of ramus, above the level of mandibular foramen.
Condylar process.
Coronoid process.