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': "Test tube-shaped rete pegs is a feature of: \nSelect and explain. \nA. Psoriasis., B. Reiter's syndrome., C. Geographic tongue., D. OSMF.", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Monro abscess seen in:\n\nPsoriasis, geographic tongue\n\n\xa0 ↓\nElongation of rete ridges\n\nReiter’s syndrome\n\n\xa0 ↓\nNo elongation\nIn Psoriasis → ‘Test tube’ shaped rete ridges', 'role': 'assistant'}]