If DNA Polymerase III Introduces an Incorrect Nucleotide, What Is

If DNA polymerase III introduces an incorrect nucleotide, what is the first corrective action made by the DNA repair system?
a. The mismatch repair system scans for base-pairing mismatches.
b. The excision repair proteins remove the incorrect nucleotide.
c. DNA ligase connects the correct nucleotide.
d. The replication complex excises the incorrect nucleotide.
e. There is no correction, because nucleotide errors by DNA polymerases are not repaired.

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