Which of the next mutations would not be possible

What piece of evidence would actually allow us to measure
May 4, 2020
Solution-What are different potential products of nitrate
May 4, 2020

Which of the next mutations would not be possible

Q. Assume that there are 63 different naturally occurring amino acids. If all 64 possible combinations of bases for a codon resulted in coding for 63 different amino acids and one stop codon, which of the next mutations would NOT be possible?

A) Nonsense mutations,

B) Silent mutations,
C) missense mutations,

D) Frame shift mutations,

E) All of these types of mutations would still be probable.