This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Haematology, Subject name: Medicine
[{'content': 'All of the following are the good prognostic features for Hodgkin&;s disease except - \nSelect and explain. \nA. Haemoglobin > 10 gm\\/dl, B. WBC count < 15000\\/mm3, C. Absolute lymphocyte count < 600\\/ul, D. Age < 45 yrs', 'role': 'user'}, {'content': 'Answer: C \nExplanation: <p>The Hesenclever prognostic index for advanced Hodgkin lymphoma includes poor prognostic factors such as age >45 yrs, male gender,serum albumin <40g/L,Hb<10.5g/dL,stage 4 disease , WBC count >15 x10^9 /L, lymphopenia <0.6x10^9/L.</p><p>Reference :Davidson&;s principles & practice of medicine 22nd edition pg no1043</p>', 'role': 'assistant'}]