This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General, Subject name: Physiology
Following is given with iron to increase its absorption - 
Select and explain. 
A. Milk, B. Antacids, C. Citrus fruits, D. Alkalies
C: Citrus fruits
Answer: C: Citrus fruits 
Explanation: Ans. is 'c' i.e., Citrus fruitso Citrus fruits are good sources of vitamin C (ascorbic acid) which increases intestinal absorption of iron.Factors affecting iron absorptionA. Decreasing absorption# By complexing (forming chelate) with irono Phytateso Milko Tetracyclineo Phosphateso EDTA # By opposing reduction of ferric form to ferrous form.o Pancreatic secretionso Antacidso AlkaliesB. Increasing absorption# By enhancing reduction of ferric form to ferrous form.o Ascorbic acido Citric acido HC1o Gastric secretion