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
All the following are rich in carotene, except? 
Select and explain. 
A. Tomato, B. Carrot, C. Spinach, D. Maize
D: Maize
Answer: D: Maize 
Explanation: Green and yellow vegetables usually contain Vit A.