Answer
$phenol$ is the most soluble in water.
Work Step by Step
$phenol$ is the most soluble in water because it form better hydrogen bonds than $ cyclohexanol$. Also, $phenol$ will be ionized more than $ cyclohexanol$ it is a stronger acid. Lastly, $4-methylcyclohexanol$ has the hydrophobic $methyl$ group which lowers its solubility in water.