Which is not correct when describing substitution mutations

Which is not correct when describing substitution mutations? A transition is the substitution of a purine for a purine or of a pyrimidine for a pyrimidine They can lead to nonsense (stop codon), missense (wrong amino acid) mutation and silent mutations (same amino acid) Transition mutations include A T base chages Transversion mutations include A C A transversion is the substitution of a pyrimidine for a purine or of a purine for a pyrimidine

Solution

Transition mutations include A--->T base changes

Explanation:

Transition mutations involve replacement of a purine base with another purine or replacement of a pyrimidine with another pyrimidine. A is a purine and T is a pyrimidine.