You are working as a doctor in a correctional facility. Your next patient is Dr. Stacks. You remember him fondly, and say “Doc! How did you end up in here.” “Ahhh, you were always one of my favorite students” Dr. Stacks said. “But sadly, a stray nerf dart, hit a stray eye, which triggered a stray law suit, and uncovered a wee bit of an embezzlement scheme I was involved in.” “Now for old time sake, how about you tell me which of following is NOT an acute toxicity of radiation therapy for esophageal cancer.” You want to make Dr. Stacks proud, so you answer: