The given graph shows an oxygen dissociation curve for haemoglobin.
Wher is the body will haemoglobin be saturated at the percentage shown at point `1,2` and `3` in graph ?
A. `{:("Left ventricle","Pulmonary vein","Vena cava"),(1,2,3):}`
B. `{:("Left ventricle","Pulmonary vein","Vena cava"),(2,1,3):}`
C. `{:("Left ventricle","Pulmonary vein","Vena cava"),(2,3,1):}`
D. `{:("Left ventricle","Pulmonary vein","Vena cava"),(3,2,1):}`