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
All the following are features of classic triad of ectopic pregnancy except 
Select and explain. 
A. Amenorrhea, B. Pain, C. Bleeding, D. Mass per abdomen
D: Mass per abdomen
Answer: D: Mass per abdomen 
Explanation: The classic triad of ectopic pregnancy is delayed menstruation, pain, and vaginal bleeding or spottingReference: William's Obstetrics; 25th edition; Chapter 19; Ectopic pregnancy