This type of mutation is beneficial mutation
Mutations are permanent transmissible changes that occur in an individual’s genetic code. Some of these changes can cause destructive conditions such as sickle cell disease or Down syndrome, while many may not be harmful, and even irrelevant. Sometimes, a mutation that will provide an individual with a benefit may take place. This type of mutation is said to be beneficial. An example is the trichomatic vision of humans which gives humans the ability to perceive, and distinguish between red, green, and blue colors.
An aminoacyl tRNA synthetase (aaRS) is anenzyme that attaches the appropriate amino acid onto its tRNA.
First question: ans= D
second question: ans=A