<prompt> Treatment of choice for Hairy cell leukaemia ?IFNXSplenectomyCladribineNone  <response>: Cladribine or 2-chlorodeoxyadenosine is a purine analogue that targets lymphocytes selectively supress immune system.It is used to treat hairy cell leukaemia .Reference :Davidsons principles practice of medicine 22nd edition pg no 1041. 