The following are multiple choice questions (with answers) about medical knowledge.   **Question:** A young donor came to the blood bank for the first time for platelet apheresis with platelet count of 1.9L. During the course he developed paresthesias, circumoral numbness during donation. His vitals remain stable though. ECG showed tachycardia with ST-T changes. What is the reason for his symptoms?   (A) Hypovolemic shock   (B) Hypocalcemia   (C) Seizures   (D) Allergic reaction
['(B) Hypocalcemia <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Hypovolemic shock \n (B) Hypocalcemia \n (C) Seizures \n (D) Allergic reaction <> possible answers', '  A young donor came to the blood bank for the first time for platelet apheresis with platelet count of 1.9L. During the course he developed paresthesias, circumoral numbness during donation. His vitals remain stable though. ECG showed tachycardia with ST-T changes. What is the reason for his symptoms? <> context@']