# Bacteria found in gingivitis are localized in:
A. Connective tissue fibres
B. Gingival Sulcus
C. Alveolar bone
D. Periodontal ligament
The correct answer is B. Gingival sulcus.
The pathologic changes of gingivitis are associated with the presence of oral microorganisms attached to the tooth and perhaps in or near the gingival sulcus.
Reference: Carranza's Clinical Periodontology, 12th Edition, Page no: 219
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