The correct option is D All of the above
Anaemia is a condition in which the blood doesn't have enough healthy red blood cells.
The major causes are iron deficiency (low-level iron) anaemia
Symptoms of anaemia: pale skin., fatigue., weakness., tiring easily., breathlessness, drop in blood pressure when standing from a sitting or lying position, this may happen after blood loss, frequent headaches.
Hence, the symptoms of anaemia are a weakness.