- A Excess iron accumulation building up gradually in the bloodstream, causing toxic overload
- B Deficiency of haemoglobin or red blood cells, reducing oxygen-carrying capacity of blood
- C Excess production of white blood cells originating from the bone marrow over time
- D A deficiency of circulating white blood cells that gradually reduces overall immunity
Correct answer: B. Deficiency of haemoglobin or red blood cells, reducing oxygen-carrying capacity of blood
Explanation: Anaemia: reduced haemoglobin or RBC count, reducing blood oxygen-carrying capacity. Causes: iron deficiency (most common), B12/folate deficiency, haemolysis (e.g., malaria, sickle cell), bone marrow failure. Symptoms: fatigue, pallor, breathlessness.
Concept context
Pathogens, infectious diseases, non-infectious diseases, drugs, cancer, and public health. High NEET importance.