Mr. r's beta-thalassemia is causing him to destroy his red blood cells too rapidly. let's review the red blood cell life cycle and how they are destroyed and recycled.

Beta thalassemia is an inherited disorder of blood that has abnormally low levels in hemoglobin unit caused by mutation of beta-chain genes of chromosome 11. Mr. R's red blood cells (RBCs) are produced by the bone marrow. During the 120 days life span of RBCs, various chemical and metabolic processes are occurring causing its deformity. RBCs are then phagocytized and they release hemoglobin. Hemoglobin are hydrolyzed and broken down into heme and globin chains. Globin chains should be broken down to amino acids and released into amino acid pool while heme is broken down further into iron and protoporphyrin with CO2. In cases of thalassemia, further processes can't be synthesized because of lack of beta globin chains. 

The plates kept rubbing together

The answer is d have a nice day