Which of the following tumors may arise in the parotid salivary gland?
1. Mixed tumor.
2. Adenocarcinoma.
3. Warthin's tumor.
4. Mucoepidermoid tumor.

(2) (3) (4)

(1) (3) (4)

(1) (2) (4)

(1) (2) (3)

All of the above.