The correct option is Update-AzAksNodePool.

The Update-AzAksNodePool cmdlet is used to modify properties of an existing AKS node pool and it supports changing autoscaler settings such as the minimum and maximum node counts. You use this command when you need to adjust node pool scaling limits through Azure PowerShell and you provide the appropriate parameters to set the min and max values.

Start-AzAksCluster is not correct because that cmdlet is intended to start a stopped managed cluster and it does not configure node pool autoscaler settings.

Update-AzAksCluster is not correct because that cmdlet updates cluster level properties rather than the specific node pool scaling parameters. Node pool min and max counts are managed at the node pool level.

Set-AzAksCluster is not correct because it is not the cmdlet used to change node pool autoscaler limits. It does not target individual node pool settings needed to set minimum and maximum node counts.

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