Which of the following attains adult size before bih?: (A) Ear ossicles, (B) Maxilla, (C) Mastoid process, (D) Parietal bone
Answer is A. The ossicles of the middle ear fully ossify in the fouh month of intrauterine lifeThey are the first bones in body to do soRef: Inderbir Singh&;s Human embryology; Tenth edition; Pg 368