Correct option is A
✔ Protein content in animal products:
· Cow milk: ~3.3% protein
· Egg: ~12–13% protein
· Fish: ~20–25% protein
· Meat: ~18–25% protein
✔ Why cow milk?
· Among all listed, cow milk has the lowest protein percentage.
✔ Final Conclusion
· Minimum protein content is found in cow milk.