Which of the following is not a correct statement for primary aliphatic amines?

• A

  Primary amines can be prepared by the Gabriel phthalimide synthesis.
• B

  Primary amines are less basic than the secondary amines.
• Correct answer
  C

  The intermolecular association in primary amines is less than the intermolecular association in secondary amines.
• D

  Primary amines on treating with nitrous acid solution form corresponding alcohols except methyl amine.

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