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
[{'content': 'All the following are true about diploic vein except \nSelect and explain. \nA. Lined by single Layer of endothelium suppod by elastic tissue, B. Present in cranial bones, C. Valveless/thin walled, D. Develop by 8th week of IUL', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e., Develops by 8th week of IUL The skull is unilamellar at bih with out any diploe and diploic veins which sta to develop at around 2 years after bih.', 'role': 'assistant'}]