Basanti, a 28 yrs aged female with a history of 6 weeks of amenorrhea presents with pain in abdomen;USG shows fluid in pouch of doghlous.Aspiration yields dark colour blood that fails to clot.Most probable diagnosis is

• A. Ruptured ectopic pregnancy
• B. Ruptured ovarian cyst
• C. Pelvic abscess
• D. Red degeneration of fibroid