The predominant organism(s) associated with chronic (adult) periodontitis is/are
1. Prevotella intermedia.
2. Pseudomonas aeruginosa.
3. Porphyromonas gingivalis.
4. Heliobacter pilori.

(1) and (3)

(1) (2) (3)

(2) and (4)

(4) only

All of the above.