This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hyper Pigmented Disorders, Subject name: Dental
[{'content': "Which of the following sign is present in Subungual melanoma? \nSelect and explain. \nA. Hutchinson's sign, B. Fitzpatrick's sign, C. Pastia's sign, D. Frank's sign", 'role': 'user'}, {'content': "Answer: A \nExplanation: Hutchinson's sign: Periungual extension of brown-black pigmentation from longitudinal melanonychia onto the proximal and lateral nail folds, is an impoant indicator of subungual melanoma. Fitzpatrick's sign: Also called as Dimple sign present in dermatofibroma. Pastia's sign: in streptococcal scarlet fever. Frank's sign-Frank's sign is a diagonal crease inthe ear lobeextending from the tragus across the lobule to the rear edge of the auricle. Frank's sign is indicative ofcardiovascular diseaseand/or diabetes. Hutchinson's sign- If there is skin lesions at the tip, side, or root of the nose there are strong chances of ocular inflammation and corneal denervation in HZO.", 'role': 'assistant'}]