19. One hundred patients discharged from the hospital with a diagnosis of proximal deep venous thrombosis were followed for up to 8 years for the development of venous ulceration (DVT group). They were compared to a group of 200 patients who were discharged from the hospital with a diagnosis of pneumonia (the control group). At the end of 5 years, 25 patients in the DVT group and 2 patients in the control group developed venous ulceration. Which of the following is the relative risk for development of venous ulceration 5 years following deep venous thrombosis? OA) 1 O B) 2 O C) 2.5 OD) 10 D E) 12.5 F) 20 G) 25 1) 50