This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Proteins, Fats, Rich Sources, Subject name: Social & Preventive Medicine
Fish is the source of all except: 
Select and explain. 
A. Iron, B. Iodine, C. Vitamin A, D. Phosphorus
B: Iodine
Answer: B: Iodine 
Explanation: FISH IS: Richest source of Vitamin A and D is fish liver oils (especially Halibut fish). Rich source of proteins (15-25 percent). Rich source of Calcium, phosphorus, fluorides Good source of iron Poor source of carbohydrates & iodine (barring few sea fish).