Answer:
The answer to your question is d) Denatured
Step-by-step explanation:
A) Neutralized this is a chemical process to obtain a salt and water, it doesn't used for proteins. This option is incorrect.
B) Naturalized. Proteins must must naturalized to keep working, when a protein is naturalized it has all its functions. This is not the right option, this question ask us the oposite.
C) Deneutralized This definition is not used for proteins, this option is incorrect.
D) Denatured. Maintaining normal blood pH proteins are protected from being denatured, that means that the lost their function. This is the right answer.