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

• A
  The intermolecular association in primary amines is less than the intermolecular association in secondary amines.
• B
  Primary amines on treating with nitrous acid solution form corresponding alcohols except methyl amine.
• C
  Primary amines are less basic than the secondary amines.
• D
  Primary amines can be prepared by the Gabriel phthalimide synthesis.