When a cytosine base is replaced by a thymine base during the DNA replication process, this change results in a substitution mutation. This is because one base is exchanged for another, which can lead to a change in the sequence of nucleotides and potentially affect the corresponding codon during translation.
In this scenario, if the change leads to the incorporation of a wrong amino acid in the resulting protein, we specifically refer to it as a substitution mutation. Therefore, the correct statement is:
wrong amino acid is produced and attached to a protein resulting in a substitution mutation.