Which clinical signs are expected in a patient with hyperthyroidism?

In patients with hyperthyroidism, the clinical signs typically reflect an increase in metabolic activity due to elevated levels of thyroid hormones. Tachycardia, which is an increased heart rate, is a common cardiovascular manifestation. It occurs as the body's metabolism accelerates, demanding more oxygen and energy, which the heart responds to by pumping faster.

Exophthalmos, or protrusion of the eyes, is another hallmark sign often associated with Graves' disease, an autoimmune form of hyperthyroidism. This occurs due to inflammation and swelling of the tissues behind the eyes, which can lead to the characteristic bulging appearance.

The combination of tachycardia and exophthalmos provides strong clinical indicators of hyperthyroidism, making this answer correct. In contrast, the other options describe symptoms that align more closely with conditions like hypothyroidism or are less specific to hyperthyroidism.