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: Forensic Medicine
All of the following ossification centers are present at 7 months of intrauterine life except ? 
Select and explain. 
A. Talus, B. Calcaneum, C. Clavicle, D. Olecranon
D: Olecranon
Answer: D: Olecranon 
Explanation: Ans. is 'd' i.e., Olecranon