Deficiency of iron does not cause goitre, polio, rickets, or scurvy. Goitre is actually caused by a lack of iodine, not iron. Polio is a viral infection that affects the nervous system and is not related to iron deficiency. Rickets is a condition caused by a deficiency of vitamin D, calcium, or phosphate, and is not directly linked to iron deficiency. Scurvy is caused by a deficiency of vitamin C, not iron.

Iron deficiency, on the other hand, can lead to a condition called iron deficiency anemia. This occurs when there is a lack of iron in the body, which is necessary for the production of hemoglobin in red blood cells. Symptoms of iron deficiency anemia include fatigue, weakness, pale skin, shortness of breath, and difficulty concentrating.