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
Which of the following about severe combined immunodeficiency is not true - 
Select and explain. 
A. Due to deficiency of adenylate kinase, B. Toxicity to leucocytes due to accumulation of dAMP, C. Both cellular and humoral immunity affected, D. Bone marrow transplantation is the treatment
A: Due to deficiency of adenylate kinase
Answer: A: Due to deficiency of adenylate kinase 
Explanation: Ans. is 'a' i.e., Due to deficiency of adenylate kinase