A patient has acute pain and a swelling on the buccal of tooth 2.6. There is a mid-buccal 10mm pocket. Which of the following is needed to confirm the diagnosis of acute periodontal abscess?

Positive pulp test result

Tenderness to percussion

Communication of the mesial and distal furcations with the buccal furcation.

Radiolucency on a periapical radiograph