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: Social & Preventive Medicine
Tomatoes are rich in 
Select and explain. 
A. Citric acid, B. Oxalic acid, C. Acetic acid, D. Formic acid
A: Citric acid
Answer: A: Citric acid 
Explanation: None