In Cicatrial pemphigoid, which antigen is bound by IgG on the epidermal side of the salt split skin technique:___________?

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In Cicatrial pemphigoid, which antigen is bound by IgG on the epidermal side of the salt split skin technique:___________?

A. XVII collagen
B. Epiligrin
C. Laminin 5
D. BP antigen 1 & 2