12.下列何種狀況有可能造成全血球減少？(1)嚴重 Vit B12 deficiency；(2) Myelodysplastic syndrome；(3) Liver cirrhosis；(4) Autoimmune disease
(A)(4)
(B)(2)+(4)
(C)(2)+(3)
(D)(2)+(3)+(4)
(E)(1)+(2)+(3)+(4)