The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Concentration of adrenaline in local anaesthetic solution for achieving haemostasis & vasoconstriction at surgical site?   (A) 1:20000   (B) 1:50000   (C) 1:80000   (D) 1:100000
['(B) 1:50000 <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) 1:20000 \n (B) 1:50000 \n (C) 1:80000 \n (D) 1:100000 <> possible answers', '  Concentration of adrenaline in local anaesthetic solution for achieving haemostasis & vasoconstriction at surgical site? <> context@']