This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Gynaecology & Obstetrics
[{'content': 'Medical treatment of unruptured ectopic pregnancy is contraindicated in : \nSelect and explain. \nA. Sac size 3 cm, B. HCG level 3000 IU, C. Foetal hea activity present, D. 70 ml blood collection in pelvis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Foetal hea activity present', 'role': 'assistant'}]