Among the following the most stable compound is:

$Trans$ configurations are generally more stable than $cis$ because in $cis$, bulky groups are close enough to cause steric repulsion. In the case of 1,3-cyclohexanediol, the $trans$ isomer is particularly stable because the hydroxyl groups are placed further apart to minimize repulsion. Thus, $trans$ -1,3-cyclohexanediol is the most stable among the options.