Final answer:
Panagglutination is the state in which an individual's RBCs are agglutinated by all sera regardless of blood type, due to multiple antibodies present in the serum that can bind to different antigen sites on the red blood cells.
Step-by-step explanation:
The state in which an individual's RBCs are agglutinated by all sera regardless of blood type is called Panagglutination. This occurs when there are multiple antibodies present in the serum that can bind to different antigen sites on the red blood cells, causing them to clump together, due to multiple antibodies present in the serum that can bind to different antigen sites on the red blood cells.