"Nitrous acid causes all possible transitions (A<-- -->G, C<-- -->T). If a protein has an alanine at position 65, what amino acid(s) would be likely to replace alanine as a result of nitrous acid mutagenesis?a. isoleucine

b. "valine, threonine"

c. threonine

d. "isoleucine, threonine, valine"

e. leucine