The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Which of the following is used by RBCs in the fasting state?   (A) Glucose   (B) Alanine   (C) Ketone body   (D) Fatty acid
['(A) Glucose <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Glucose \n (B) Alanine \n (C) Ketone body \n (D) Fatty acid <> possible answers', '  Which of the following is used by RBCs in the fasting state? <> context@']