The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Which is responsible for adhesion of platelet on exposed collagen fibril after an injury   (A) Von willebrand factor   (B) Factor 8   (C) Factor 9   (D) Fibronectin
['(A) Von willebrand factor <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Von willebrand factor \n (B) Factor 8 \n (C) Factor 9 \n (D) Fibronectin <> possible answers', '  Which is responsible for adhesion of platelet on exposed collagen fibril after an injury <> context@']