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: Skin
Which of the following presents with a "string of pearl appearance"? 
Select and explain. 
A. Pemphigus vulgaris, B. Bullous pemphigoid, C. Linear IgA disease, D. Dermatitis herpetiformis
C: Linear IgA disease
Answer: C: Linear IgA disease 
Explanation: The lesions in Linear IgA disease with a bimodal age distribution ie 60 yrs comprise of uicated plaques and papules, and annular, polycyclic lesions often with blistering around the edge, the string of pearls sign/cluster of jewels sign.