In which of the following reactions is the final product $NOT$ a ketone?

• A
  $CH_3-C \equiv CH$ $\xrightarrow{NaNH_2} (A)$ $\xrightarrow{CH_3-I} (B)$ $\xrightarrow{HgSO_4, H_2SO_4} (C)$
• B
  $HC \equiv CH$ $\xrightarrow{NaNH_2} (C)$ $\xrightarrow{CH_3-CH_2-I} (D)$ $\xrightarrow{Hg(OAc)_2, H_2O / NaBH_4, OH^{-}} (E)$
• C
  $R-C(=O)-OH$ $\xrightarrow{NaOH} (A)$ $\xrightarrow{CH_3-I} (B)$
• D
  $1-butyne$ $\xrightarrow{NaNH_2} (A)$ $\xrightarrow{CH_3-I} (B)$ $\xrightarrow{(1) BH_3, THF; (2) H_2O_2/OH^{-}} (C)$