This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Oncology, Subject name: Medicine
Natural elements having anticancer propeies - 
Select and explain. 
A. Nitrosoamines, B. Vit. C, C. V1L D, D. Carotene
B: Vit. C
Answer: B: Vit. C 
Explanation: Actions of vitamin C include antioxidant activity, promotion of nonheme iron absorption, carnitinebiosynthesis, conversion of dopamine to norepinephrine, and synthesis of many peptide hormones. Vitamin C is also impoant for connective tissue metabolism and cross-linking (proline hydroxylation), and it is a component of many drug-metabolizing enzyme systems, paicularly the mixed-function oxidase systems . The antioxidant activity of Vit C results in anticancer propeies . Ref - Harrison internal medicine 20e p2313