Which one of the following reactions will not form acetaldehyde?

• Correct answer
  A

  ${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{OH}\stackrel{{\mathrm{CrO}}_3-{\mathrm{H}}_2{\mathrm{SO}}_4}{⟶}$
• B

  ${\mathrm{CH}}_2={\mathrm{CH}}_2+{\mathrm{O}}_2\frac{\mathrm{Pd}\left(\mathrm{II}\right)/\mathrm{Cu}\left(\mathrm{II}\right)}{{\mathrm{H}}_2\mathrm{O}}$
• C

  ${\mathrm{CH}}_3\mathrm{CN}\frac{ \mathrm{i}) \mathrm{DIBAL}-\mathrm{H}}{ \mathrm{ii} ){\mathrm{H}}_2\mathrm{O}}>$
• D

  ${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{OH}\frac{\mathrm{Cu}}{573 \mathrm{K}}>$

Hence, the correct answer is option: 'A'.