This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T., Subject name: Medicine
[{'content': 'A 29-year-old woman has recently developed milk intolerance. \nSelect and explain. \nA. celiac disease, B. gastrinoma, C. hyperthyroidism, D. associated with skin pigmentation', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Acquired lactase deficiency is very common in GI diseases with evidence of mucosal damage. Examples include celiac and tropical sprue, viral and bacterial infections, giardiasis, cystic fibrosis, and ulcerative colitis. It is not caused by a hyper-sensitivity reaction.', 'role': 'assistant'}]