This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Intra Uterine Growth Restriction, Intrapaum and Antepaum Fetal Surviellance, Subject name: Gynaecology & Obstetrics
[{'content': 'The most common explanation for fetal tachycardia is - \nSelect and explain. \nA. Maternal administration of parasympathetic or sympathomimetic drugs, B. Maternal fever from amnionitis, C. Fetal cardiac defects, D. Cardiac arrhythmias', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Fetal tachycardia is defined as a baseline hea rate greater than 160 bpm. The most common explanation for fetal tachycardia is maternal fever from chorioamnionitis, although fever from any source can increase baseline fetal hea rate. Other causes of fetal tachycardia include fetal compromise, cardiac arrhythmias, and maternal administration of parasympathetic(atropine) or sympathomimetic (terbutaline) drugs.', 'role': 'assistant'}]