Which of the following is a symptom of anemia?

Fatigue is a common symptom of anemia due to the reduced levels of hemoglobin in the blood, which leads to insufficient oxygen delivery to the body's tissues. This oxygen deficiency can result in tiredness and a general lack of energy, making individuals feel weak and lethargic. Anemia often occurs when there is a deficit of red blood cells or hemoglobin, which can result from various factors such as nutritional deficiencies, chronic diseases, or blood loss.

While chest pain, high blood pressure, and nausea may also occur in different medical conditions, they are not primary symptoms of anemia. Chest pain may relate to cardiovascular issues, high blood pressure is more indicative of circulatory problems, and nausea can arise from a myriad of gastrointestinal or systemic problems. Therefore, fatigue stands out as a hallmark sign of anemia, directly linked to its physiological effects on oxygen transport and energy levels in the body.