The following are multiple choice questions (with answers) about medical knowledge.   **Question:** A second-year PG resident tells you to perform an ABG of a patient. All of the following are true about performing an ABG except:   (A) Before performing the ABG, syringe should be loaded with 0.3 cc of heparin   (B) Normal pH, HCO. and PCO, levels may not indicate absence of an acid-base imbalance   (C) A different site should be tried i f modified Allen's test is negative   (D) Radial aery is the preferred site
['(A) Before performing the ABG, syringe should be loaded with 0.3 cc of heparin <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', "(A) Before performing the ABG, syringe should be loaded with 0.3 cc of heparin \n (B) Normal pH, HCO. and PCO, levels may not indicate absence of an acid-base imbalance \n (C) A different site should be tried i f modified Allen's test is negative \n (D) Radial aery is the preferred site <> possible answers", '  A second-year PG resident tells you to perform an ABG of a patient. All of the following are true about performing an ABG except: <> context@']