This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General obstetrics, Subject name: Gynaecology & Obstetrics
[{'content': 'Indications of medical management In ectopic \nSelect and explain. \nA. Presence of fetal hea activity, B. Size <4 cm, C. Gestation <6 weeks, D. a-hCG>1500', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Criteria for selection Hemodynamically stable No intrauterine pregnancy on ultrasound No tubal rupture Size of ectopic less than 4 cm If there is foetal cardiac activity use with caution Beta hcg level preferably less than 3000 IU/L (refer pgno:162 sheila 2 nd edition)', 'role': 'assistant'}]