This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nutrition and Metabolic disorders,Systemic conditions ,Genodermatoses, Connective tissue disorders,Photodermatoses, Subject name: Dental
Periungual telangiectasias are pathognomonic signs of the following except: 
Select and explain. 
A. Polyaeritis nodosa, B. Lupus erythematosus, C. Systemic sclerosis, D. Diabetes mellitus
A: Polyaeritis nodosa
Answer: A: Polyaeritis nodosa 
Explanation: Periungual telangiectasias - Pathognomonic signs of three major autoimmune connective tissue diseases: Lupus erythematosus Systemic sclerosis DM