Which of the following situations will lead to increased viscosity of blood?

Multiple myeloma is assosiated with increased level of Bence Jones proteins and myeloma globulin due to their abnormal formation in the bone marrow Increase in conc: protein increase viscosity of the blood Hyperviscosity syndrome- clinically represent a triad --mucosal bleeding, visual changes,neurological symptoms. Constitutional and cardiovascupar symptoms are also seen . Ref: Medical Physiology Indu Khurana 2015 edition page No: 99