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
All of the following are the good prognostic features for Hodgkin&;s disease except - 
Select and explain. 
A. Haemoglobin > 10 gm\/dl, B. WBC count < 15000\/mm3, C. Absolute lymphocyte count < 600\/ul, D. Age < 45 yrs
C: Absolute lymphocyte count < 600\/ul
Answer: C: Absolute lymphocyte count < 600\/ul 
Explanation: <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>