Which of the following types of mutations most likely results from the alkylation of the oxygen on position 6 of guanine base,producing O⁶-methylguanine?

Question

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Alkylation of the oxygen on position 6 of guanine base produces O⁶-methylguanine which is a type of DNA damage known as a transition mutation. Transition mutations result from the replacement of a purine with a different purine or a pyrimidine with a different pyrimidine. Deletion, insertion, and frameshift mutations occur due to the addition or deletion of one or more nucleotides from the DNA sequence.

Which of the Following Types of Mutations Most Likely Results