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
Which of the following acts as defence against E.coli? 
Select and explain. 
A. Lactoglobulin, B. Lactalbumin, C. Lactoferrin, D. None of the above
C: Lactoferrin
Answer: C: Lactoferrin 
Explanation: Lactoferrin binds to iron and makes it unavailable for E.coli and acts a defence mechanism against infections. Ref: Nutrition and Child Development, K.E. Elizabeth, 4th edition pg: 17