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
Granular deposits of IgA is seen in: 
Select and explain. 
A. Bullous pemphigoid, B. Linear IgA bullous disorder, C. Dermatitis Herpetiformis, D. Hailey-Hailey disease
C: Dermatitis Herpetiformis
Answer: C: Dermatitis Herpetiformis 
Explanation: Bullous pemphigoid : Linear deposition of IgA and IgG at DEJ
Linear IgA bullous disorder : Linear deposition of IgA at DEJ
Dermatitis herpetiformis : Focal granular IgA deposits at papilary tips.
Hailey-Hailey disease : DIF : negative