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: Medicine
Which of the following statements are true regarding an immunocompromised person? 
Select and explain. 
A. Increased susceptibility to virus and fungi in T cell deficiency, B. Increased susceptibility to capsulated bacteria in B cell deficiency, C. Increased susceptibility to pyogenic infections in granulocyte deficiency, D. All the above
D: All the above
Answer: D: All the above 
Explanation: In humoral immune deficiency, affected components are B cells, plasma cells orantibodies. Causes are, primary humoral, multiple myeloma, chronic lymphoid leukemia, AIDS. In T cell deficiency, T cells are affected. Main causes are marrow and other transplantation, AIDS, cancer chemotherapy, lymphoma, glucocoicoid therapy. In neutropenia, neutrophil granulocytes are affected. Causes are, chemotherapy, bone marrow transplantation, dysfunction, such as chronic granulomatous disease. Congenital deficiencies are the reason for complement deficiency.