This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General physiology, Subject name: Physiology
[{'content': 'Which of the following sources of cholesterol is most impoant for sustaining adrenal steroidogenesis when it occurs at a high rate for a long time \nSelect and explain. \nA. De novo synthesis of cholesterol from acetate, B. Cholesterol in LDL paicles, C. Cholesterol in the plasma membrane, D. Cholesterol in lipid droplets within adrenal coical cells', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Cholesterol esters in LDL are the most impoant source of cholesterol for sustaining adrenal steroidogenesis when it occurs at a high rate over a long time. This cholesterol can be used directly after release from LDL and not stored. De novo synthesis of cholesterol from acetate is a minor source of cholesterol in humans.Ref: Harper&;s Biochemistry; 30th edition', 'role': 'assistant'}]