UPSC CDS 2 2022 GK Paper

Concept:Iron is an essential nutrient required to form $\mathrm{haemoglobin}$, the protein that carries oxygen in blood.Explanation:The body needs iron to make $\mathrm{haemoglobin}$ in red blood cells.Without enough iron, $\mathrm{haemoglobin}$ production decreases.Less $\mathrm{haemoglobin}$ means less oxygen is transported to tissues.This leads to tiredness, pale skin, and weakness — the main symptoms of anaemia.Anaemia is defined as a low red blood cell count or low $\mathrm{haemoglobin}$ level.In contrast, scurvy is caused by $\mathrm{vitamin\ C}$ deficiency, not iron.Rickets results from $\mathrm{vitamin\ D}$, calcium, or phosphate deficiency.Cholera is a bacterial infection caused by $\mathrm{Vibrio\ cholerae}$, not a nutritional deficiency.Therefore, iron deficiency specifically leads to anaemia.Answer:Anaemia.