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
Sunflower seeds are good source of all of the following, EXCEPT: 
Select and explain. 
A. B complex vitamins, B. Vitamin E, C. Vitamin A, D. Selenium
C: Vitamin A
Answer: C: Vitamin A 
Explanation: "Sunflower seeds are unusually rich in B- complex vitamins. Sunflower seeds also contain a potent antioxidant team of selenium and vitamin E and are significantly deficient in vitamin A. Active form of vitamin A (retinol) is found in animal products such as milk, egg yolk, fish, and liver. The precursor of vitamin A (beta- carotene) can be obtained from fruit and vegetables, and conveed to the active form in the body. Tomato is good source of vitamins especially vitamin A and C. Ref: Harrison, 18/e, chapter 74