Answer: Option C.
Inefficient oxygen transportation .
Explanation:
Sickle cell anaemia is an inheritable condition in which the the red blood cell cannot transport oxygen effeciently in the blood to organs because of it's distorted shape which is sickle.
Red blood cells function in transporting oxygen in the blood because of it's iron component, when it is distorted it can't carry oxygen efficiently.
This can lead to damage to lungs, livers, nerves, spleens, organs.
