Which of the following statements is not correct?

(b) The compound is

(c) Thiols are less polar than the alcohols.

(d) The negative charge on S (which is larger in size than oxygen) is more spread on its conjugate base ${\mathrm{RS}}^{-}$ of the acid RSH as compared to that on O of ${\mathrm{RO}}^{-}\text{, }$  Thus, ${\mathrm{RS}}^{-}$ is less likely to attract ${\mathrm{H}}^{+}$ than ${\mathrm{RO}}^{-}$ , making RSH more acidic than ROH.