The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Which of the following anticoagulant is used for electrolyte estimation?   (A) EDTA   (B) Citrate   (C) Sodium fluoride   (D) Lithium heparin
['(D) Lithium heparin <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) EDTA \n (B) Citrate \n (C) Sodium fluoride \n (D) Lithium heparin <> possible answers', '  Which of the following anticoagulant is used for electrolyte estimation? <> context@']