This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: JIPMER 2017, Subject name: Biochemistry
[{'content': "A patient's lipid profile is as follows, TG - 200 mg/dL, Total Cholesterol 300 mg/dL, HDL 40 mg/dL. Calculate LDL level in this patient. \nSelect and explain. \nA. 40 mg/dL, B. 100 mg/dL, C. 220 mg/dL, D. 260 mg/dL", 'role': 'user'}, {'content': "Answer: C \nExplanation: Friedwald's equation: Total Cholesterol = HDL+LDL+VLDL Total Cholesterol = HDL+ LDL+ TG/5 (we do not measure VLDL, we measure TG) -LDL= Total cholesterol -HDL- TG/5 (mg/dl) -LDL= Total cholesterol - HDL - TG/2.2 (mmol/L) Total Cholesterol = 300 - 40 - 200/5 = 220 mg/dl", 'role': 'assistant'}]