Which of the following statements is not correct?

Quaternary ammonium salts in which nitrogen holds four different groups show optical activity

Aliphatic amines can be prepared by ammonolysis of alkyl halides but not aromatic amines.

Ammonolysis of alkyl halides gives highest yield with tertiary halides and is worthless for primary halides.

The more stable the substituted ammonium ion relative to the amine from where it is formed, the more basic is the amine