question: Q:Two days after hospital admission and surgical treatment for a cut on his right thigh from a sickle, a 35-year-old man has fever, chills, and intense pain. The wound is swollen. He had a similar injury 4 months ago that resolved following treatment with bacitracin ointment and daily dressings. He works on a farm on the outskirts of the city. He appears anxious. His temperature is 38.5°C (101.3°F), pulse is 103/min, and blood pressure is 114/76 mm Hg. Examination shows a 6-cm edematous deep, foul-smelling wound on the medial surface of the right thigh. The skin over the thigh appears darker than the skin on the lower leg. There are multiple blisters around the wound. Light palpation around the wound causes severe pain; crepitus is present. Which of the following is the most likely causal organism?? 
  {'A': 'Clostridium perfringens', 'B': 'Pseudomonas aeruginosa', 'C': 'Rhizopus oryzae', 'D': 'Staphylococcus aureus', 'E': 'Pasteurella multocida'},