23. What is the IUPAC name for the following compound?
(A) (R)-2-bromo-2-methylcyclobutanone
(B) (S)-2-bromo-2-methylcyclobutanone
(C) (R)-2-methyl-2-bromocyclobutanone
(D) (S)-1-bromo-1-methyl-2-cyclobutanone
(E) (R)-1-bromo-1-methyl-2-cyclobutanone
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