The following are multiple choice questions (with answers) about medical knowledge.   **Question:** All of the following hemostatic agents are used as perforation repair, except?   (A) Collagen   (B) CaOH2   (C) Ferric sulphate   (D) Fridge dried bone
['(C) Ferric sulphate <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Collagen \n (B) CaOH2 \n (C) Ferric sulphate \n (D) Fridge dried bone <> possible answers', '  All of the following hemostatic agents are used as perforation repair, except? <> context@']