What is the most appropriate next investigation?

A young girl presented to gynecologist for assessment with lower abdominal pain and per vaginal bleedin of hysterosalpingograph as a part of her infertility treatment. Observation: BP=90/50mmHg, pulse-120bpm, and revealed rigid abdomen.

What is the most appropriate next investigation?
A . Coagulation profile
B . Chest X ray
C . Ultrasound abdomen
D . X-ray erect and supine
E . CT SCAN

Answer: C

Explanation:

Likely cause of bleeding and shock is ruptured fallopian tube for which appropriate ne is US abdomen.