A 60 yr old male had a sudden fall in toilet. His BP was 90/50 mm Hg and pulse was 100/min. His relatives reported that his stool was black/dark in colour. Further careful history revealed that he is a known case of hypertension and coronary artery disease and was regularly taking aspirin, atenolol and sorbitrate. The most likely diagnosis is
Gastric ulcer with bleeding
Acute myocardial infarction with cardiogenic shock
Acute cerebrovascular accident
Pulmonary embolism