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: Dental
Following are signs of internal malignancy except – 
Select and explain. 
A. Tuberous sclerosis, B. Acanthosis nigricans, C. Clubbing, D. Dermatomyositis
A: Tuberous sclerosis
Answer: A: Tuberous sclerosis 
Explanation: Acanthosis nigricans, clubbing and dermatomyositis are paraneoplastic cutaneous signs of internal malignancy.