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': 'Pseudogestational sac is seen in ultrasonography is suspicious of \nSelect and explain. \nA. Missed aboion, B. Incomplete aboion, C. Ectopic pregnancy, D. Complete aboion', 'role': 'user'}, {'content': "Answer: C \nExplanation: Anechoic fluid collections, which might normally suggest an early intrauterine gestational sac, may also be seen with ectopic pregnancy. These include pseudogestational sac and decidual cyst.A pseudosac is a fluid collection between the endometrial layers and conforms to the cavity shape. If a pseudosac is noted, the risk of ectopic pregnancy is increased Reference: William's Obstetrics; 25th edition; Chapter 19; Ectopic pregnancy", 'role': 'assistant'}]