The correct answer is B. Primary herpetic gingivostomatitis
Explanation:
The cause of primary herpetic gingivostomatitis is a virus and not a bacteria as it occurs in other gingival lesions. Indeed, this is caused by the Herpes Virus and it is an initial infection, which makes this to be more common in children than in adults. Additionally, primary herpetic gingivostomatitis causes ulcerations and sores in the mouth, especially the gums or gingiva, and can be associated with other symptoms such as fever or headache. According to this, the type of gingival lesion that is not associated with a bacteria is primary herpetic gingivostomatitis.
