Let's analyze each statement:
- Statement A: Acharya Charaka has indeed mentioned 19 Phalini Dravyas in his text. Thus, this statement is true.
- Statement B: According to Acharya Charaka, the root of Aparajita is used for Shirovirechana (a therapeutic procedure). Thus, this statement is true.
- Statement C: Bhasma is actually included in Audbhida Gana by Acharya Charaka, which is used for specific therapeutic purposes. Therefore, this statement is false.
- Statement D: The latex of Snuhi (Euphorbia) is used for both Vamana (emesis) and Virechana (purgation), as per Ayurvedic texts. Thus, this statement is true.
- Statement E: Katu rasa (pungent taste) does not increase Visha (poison) as per Ayurvedic texts, but rather has a stimulating effect. Hence, this statement is false.
Thus, the correct option is (4): A, B, D only.