determine the bases that will code for the amino acid Tryptophan

What base are the following?

The three bases are
First base of mRNA in the triplet
Second base of mRNA in the triplet
Third base of mRNA in the triplet

A.) Uracil

B.) Cytosine

C.) Adenine

D.) Guanine

The three bases that code for the amino acid Tryptophan are:

First base of mRNA in the triplet: Adenine (A)
Second base of mRNA in the triplet: Adenine (A)
Third base of mRNA in the triplet: Guanine (G)