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: Biochemistry
[{'content': 'The Vitamin A activity of beta-carotene compared to that of retinol is? \nSelect and explain. \nA. 2-Jan, B. 4-Jan, C. 6-Jan, D. 8-Jan', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Beta-Carotene (provitamin A): \n\nThis is found in\xa0plant foods. lt\xa0is cleaved in the intestine to produce two\xa0moles of\xa0 retinal.\nln\xa0humans, this conversion\xa0is\xa0inefficient,\xa0hence\xa0beta-carotene possesses about\xa0 one-sixth vitamin\xa0A\xa0activity compared to that of retinol.\n\nReference: Satyanarayana- Biochemistry, 3rd edition, pg-119', 'role': 'assistant'}]