This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
[{'content': '60 year old diabetic female presented with burning sensation to spicy food. Intraoral examination revealed multiple periodontal abscess and keratotic area in a lace pattern with occasional erosive areas inside the lace pattern.\nHistological feature will be \nSelect and explain. \nA. Elongated rete ridges, B. Flattened rete ridges, C. Saw tooth rete ridges, D. Bulbous rete ridges', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The histological features include hyperparakeratosis or hyperorthokeratosis,with thickening of granular layer, acanthosis with intracellular edema, saw tooth appearance of rete ridges, band like subepithelial mononuclear infiltrate, degenerating basal keratinocytes that form colloid known as Civatte, hyaline, cytoid bodies.', 'role': 'assistant'}]