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
Highest concentration of iodine is found in: 
Select and explain. 
A. Eggs, B. Fresh water fish, C. Oyster, D. Poultry
C: Oyster
Answer: C: Oyster 
Explanation: Fresh water fish do not contain iodine but sea fish do. Highest amount of iodine is found in lobsters and oysters. Ref: Park, 22nd edition pg: 584