Answer
The parent chain and the numbers are marked in red on the image.
Work Step by Step
1. Find the parent chain.
In this case, the rules are:
- It has to be as large as possible.
- it has to contain the function group: alcohol.
2. Identify where you are supposed to start counting.
The counting should start from the right, since the alcohol is closer to this side.
** We need to count in a way that, the alcohol will get the minimum number possible, which we do by starting from the right.
** Remember: Functional groups have higher priority than substitutents.