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
[{'content': 'Not seen in fingerprints: NEET 13 \nSelect and explain. \nA. Loop, B. Circles, C. Whorl, D. Arch', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. Circles', 'role': 'assistant'}]