Abstract
Answer D. Lichen planus
Oral lichen planus usually affects the oral mucosa and is usually idiopathic. It commonly presents with soreness exacerbated by certain foods. The appearance is typically white lines that make up a lace or net pattern termed Wickham striae (which is pathognomonic).
InnovAiT article: Suspicious oral lesions. DOI: 10.1177/17557380211008937.