You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is In a patient suffering from chronic myeloid leukemia, Hb falls from 11g% to 4g% in a short span of time, and splenomegaly occurs. The cause could be -a) Accelerated phaseb) CML in blast crisisc) Ineffective erythropoiesisd) Myelofibrosis and explain in detail?
None