What is IUPAC name of following compound?

What is IUPAC name of following compound?
  1. 1-Chloro-4-methylcyclohexan-2-one
  2. 2-Chloro-3-methyclohexanone
  3. 2-Chloro-4-methylcyclohexanone
  4. 4-Methyl-2-chlorocyclohexanone

Asked in: MHT CET 2023 (12 May Shift 2)

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