<prompt> Runt disease is -Graft rejectionGraft versus host reactionDeficient T cell functionComplement deficiency  <response>: The graft mounts an immune response against the antigens of the host is called graft-versus-host reaction. The main clinical features of the GVH reaction in animals are retardation of growth, emaciation, diarrhea, hepatosplenomegaly, lymphoid atrophy, and anemia. - terminates fatally. This syndrome is called runt disease. Reference:athanarayan panikers 9th edition, pg no: 186 p 