This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pathology, Subject name: Pathology
[{'content': 'Adenosine deaminasc deficiency is seen in the following - \nSelect and explain. \nA. Common variable immunodeficiency, B. Severe combined immunodeficiency, C. Chronic granulomatous disease, D. Nezelof syndrome', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Robbins basic pathology 6th edition. Chapter Diseases of immunity. page no. 235. Severe Combined Immunodeficiency Diseases(SCID) is autosomal recessive , most common cause being deficiency of adenosine deaminase enzyme(ADA).', 'role': 'assistant'}]