<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 35-year-old man comes to the emergency room for severe left leg pain several hours after injuring himself on a gardening tool. His temperature is 39C 102.2F and his pulse is 105min. Physical examination of the left leg shows a small laceration on the ankle surrounded by dusky skin and overlying bullae extending to the posterior thigh. There is a crackling sound when the skin is palpated. Surgical exploration shows necrosis of the gastrocnemius muscles and surrounding tissues. Tissue culture shows anaerobic gram-positive rods and a double zone of hemolysis on blood agar. Which of the following best describes the mechanism of cellular damage caused by the responsible pathogen?? A: Lipopolysaccharide-induced complement and macrophage activation, B: Degradation of cell membranes by phospholipase, C: Increase of intracellular cAMP by adenylate cyclase, D: Inactivation of elongation factor by ribosyltransferase, E: Inhibition of neurotransmitter release by protease,  <response>: This is a question about the mechanism of cellular damage caused by Clostridium perfringens, which is the likely pathogen responsible for the patients gas gangrene infection based on the clinical presentation. The choices describe different mechanisms of virulence and toxicity for various pathogens. Choice B Degradation of cell membranes by phospholipase is the correct answer, as C. perfringens secretes alpha toxin, which is a phospholipase C enzyme that degrades cell membranes. This leads to tissue necrosis and gas production, which are hallmarks of gas gangrene.B: Degradation of cell membranes by phospholipase 