The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Which of the following hea sound may be a normal finding during pregnancy?   (A) Fixed splitting of S2   (B) S3   (C) S4   (D) Pericardial knock
['(B) S3 <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Fixed splitting of S2 \n (B) S3 \n (C) S4 \n (D) Pericardial knock <> possible answers', '  Which of the following hea sound may be a normal finding during pregnancy? <> context@']