$\begin{array}{1 1}(a)\;\text{Phenols behaves as a strong acid because the resultant phenoxide ion is less stable}\\(b)\;\text{Phenols are weaker acids than alcohols}\\(c)\;\text{Phenols are soluble in sodium bicarbinate solution}\\(d)\;\text{Phenols behaves as a weak acid because the resultant phenoxide ion is more stable}\end{array}$