The disease caused due to deficiency of iron is known as

Correct answer: (c) Anaemia

Explanation

Anaemia is a fall in red blood cells (erythrocytes) or in haemoglobin, reducing oxygen transport.

Deficiency of iron, needed to make haemoglobin, causes iron-deficiency anaemia (pallor, fatigue).

Night-blindness is from vitamin A deficiency, not iron.