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
A young woman with six weeks amenorrhoea presents with mass abdomen. USG shows empty uterus. Diagnosis is : 
Select and explain. 
A. Ovarian cyst, B. Ectopic pregnancy, C. Complete aboion, D. None of the above
B: Ectopic pregnancy
Answer: B: Ectopic pregnancy 
Explanation: Ans. is b i.e. Ectopic pregnancy Well friends--a young woman presenting with 6 weeks of amenorrhea and USG showing empty uterus could either mean it is an ectopic pregnancy or aboion. In aboion -- patient will give history of bleeding. pain but mass in abdomen does not our it.