The correct order of dehydration of alcohols is

• A
  $1^{\circ} > 2^{\circ} > 3^{\circ}$
• B
  $3^{\circ} > 2^{\circ} > 1^{\circ}$
• C
  $2^{\circ} > 1^{\circ} > 3^{\circ}$
• D
  $1^{\circ} > 3^{\circ} > 2^{\circ}$