This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Misc., Subject name: Forensic Medicine
[{'content': 'Which is the ideal site to collect blood sample for toxicological analysis during autopsy? \nSelect and explain. \nA. Stomach, B. Femoral vein, C. Aorta, D. Heart', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. (B). Femoral veinTo avoid contamination from the gastric contents, blood is always collected from the peripheral vessels preferable femoral vein.', 'role': 'assistant'}]