Which of the following symptoms can indicate iron deficiency anemia?

Coarsely ridged fingernails are indeed a symptom that can indicate iron deficiency anemia. This specific finding, known as "koilonichia," is characterized by changes in the shape and texture of the nails, often presenting as spoon-shaped or ridged. Iron deficiency can cause various physiological changes in the body, including those affecting the nails, as iron plays a crucial role in the formation of hemoglobin and the overall health of cells, including keratinocytes in the nails.

Iron deficiency anemia typically presents with symptoms arising from a reduced capacity of the blood to carry oxygen, leading to fatigue, pallor, and broader systemic effects. The nail changes reflect the underlying deficiency and contribute to the overall clinical picture of iron deficiency anemia. While the other symptoms listed might suggest other conditions, they are not specific indicators of iron deficiency anemia.