નીચેનામાંથી કઈ પ્રક્રિયા રોઝનમન્ડ રિડક્શનનું ઉદાહરણ છે?

• A
  $R-CO-R \xrightarrow[\text{ethylene glycol}]{\text{NH}_2-\text{NH}_2, \Delta, \text{KOH}} R-CH_2-R$
• B
  $R-CHO \xrightarrow[\Delta]{\text{Zn-Hg} / \text{conc. HCl}} R-CH_3$
• C
  $R-CO-Cl \xrightarrow[\text{Pd/BaSO}_4]{\text{H}_2} R-CHO + \text{HCl}$
• D
  $R-CN \xrightarrow[\text{H}_3\text{O}^+]{\text{SnCl}_2 / \text{HCl}} R-CHO + \text{NH}_4\text{Cl}$