This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: vitamins, Subject name: Biochemistry
[{'content': 'Which of the following does not contain carotene? \nSelect and explain. \nA. Potato, B. Tomato, C. Carrot, D. Spinach', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Beta carotene is the pro-vitamin of vitamin A .It is present in plant tissues.It has two beta iodine rings connected by a pollyprenoid chain.One molecule of beta carotene can give rise to two molecules of vitamin A ;but it may produce only in biological systems. Vegetable sources contain the yellow pigment beta carotene.Carrot contains significant quantity of beta carotene.Papaya , mango, pumpkins gre.en leafy vegetables (spinach,amaranath) are other good sources of vitamin A . Reference:DM VASUDEVAN Textbook SEVENTH EDITION; PAGENO: 464, 469.', 'role': 'assistant'}]