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: Physiology
[{'content': 'Beta-2 transferrin is found in ? \nSelect and explain. \nA. Blood, B. Urine, C. Tear, D. CSF', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., CSFBeta-2 transferrin is an isoform of transferrin.It is found in cerebrospinal fluid (CSF).It is not found in other body fluids (blood, mucus, tear, saliva, urine).Therefore, it is a specific marker for CSF and is used for diagnostic of CSF leaks.", 'role': 'assistant'}]