This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
[{'content': 'SCID is due to deficiency of \nSelect and explain. \nA. Adenosine deaminase deficiency, B. JAK 3 mutation, C. Recombinase - activating genes mutation, D. Any of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: All of the above enzyme deficiencies cause SCID.\nMutation in cytokine receptors - M/c type defect.', 'role': 'assistant'}]