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
Pseudogestational sac seen in ultrasonography of: 
Select and explain. 
A. Missed abortion, B. Ectopic gestation, C. Complete abortion, D. Hematometra
B: Ectopic gestation
Answer: B: Ectopic gestation 
Explanation: When ultrasound examination reveals a sac without an embryo or yolk sac, the diagnosis is limited to one of three entities:

A normal early intrauterine pregnancy (IUP).
An abnormal intrauterine pregnancy (IUP).
A pseudogestational sac in a patient with an ectopic pregnancy.