The following are multiple choice questions (with answers) about medical knowledge.   **Question:** To preserve blood for transfusion later:   (A) Dilute with equal volume of 0.9% saline   (B) Add solution of sodium citrate   (C) Add solution of calcium chloride   (D) Add fibrinogen
['(B) Add solution of sodium citrate <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Dilute with equal volume of 0.9% saline \n (B) Add solution of sodium citrate \n (C) Add solution of calcium chloride \n (D) Add fibrinogen <> possible answers', '  To preserve blood for transfusion later: <> context@']