This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Genetics, Subject name: Pathology
[{'content': 'Which of the following is true regarding ataxia telangiectasia? \nSelect and explain. \nA. It is X linked recessive disease, B. It is autosomal recessive disorder, C. It is associated with increased levels of IgM, D. None of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. (b) It is autosomal recessive disorder(Ref: Robbins 9th ed p 315)Several rare autosomal recessive cancer syndromes have been described that are characterized by hypersensitivity to certain kinds of DNA-damaging agents, such as ionizing radiation (Bloom syndrome and ataxia-telangiectasia), or DNA cross-linking agents, such as many chemotherapeutic drugs (Fanconi anemia). The phenotype of these diseases is complex and includes, in addition to predisposition to cancer, features such as neural symptoms (ataxia- telangiectasia), bone marrow aplasia (Fanconi anemia), and developmental defects (Bloom syndrome).', 'role': 'assistant'}]