Thalassemia and sickle cell anemia are caused due to a problem in globin molecule synthesis. Select the correct statement
A. both are due to a qualitative defect in globin chain synthesis.
B. both are due to a quantitave defect in globin chain synthesis.
C. thalassemia is due to less synthesis of globin molecules
D. Sickl cell anemia is due to a quantitative problem of globin molecules
