Which condition is most likely responsible for repeated ulcerations on the gums and palate?

Explanation

Recurrent ulcers on the gingiva and palate are commonly caused by herpes simplex virus infections. Although aphthous ulcers and Behçet’s syndrome can cause oral ulcers, herpes simplex is the most frequent cause of recurrent lesions in these areas. Koplik spots are associated with measles and do not present as recurrent ulcers.