What is IUPAC name of the following compound?

What is IUPAC name of the following compound?

1. 3-Methyl-6-ethyl cycloheptanol
2. 3-Ethyl-6-methyl cycloheptanol
3. 3-Ethyl cycloheptanol
4. 1-Ethyl-5-methyl cycloheptan-3-ol

Asked in: MHT CET 2021 (20 Sep Shift 1)

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