The correct option is D all of the above
A mixture of α-amino acids is obtained when proteins are hydrolysed by acids, bases and enzymes. Proteins are hydrolysed and broken down into its component amino acids. While there are many means of achieving this, two of the most common are prolonged boiling in a strong acid or strong base or using an enzyme such as the pancreatic protease enzyme to simulate the naturally occurring hydrolytic process.