In WHO classification of periradicular diseases code no. KO4.4 represents: (A) Acute apical periodontitis, (B) Chronic apical periodontitis, (C) Periapical abscess, (D) Radicular cyst
Answer is A. WHO classification of periradicular diseases

KO4.4….acute apical periodontitis
KO4.5…chronic apical periodontitis
KO4.6…periapical abscess with sinus
KO4.7…periapical abscess without sinus
KO4.8….radicular cyst