Which of the following is a common symptom of cadmium poisoning?

Cadmium poisoning is primarily associated with kidney dysfunction. Cadmium is a heavy metal that accumulates in the body over time, especially in renal tissues. Once it enters the body, cadmium can cause damage to the kidneys, impairing their ability to filter blood and excrete waste products. This dysfunction can lead to symptoms such as proteinuria (excess protein in urine), which can be an early sign of kidney damage, and eventually may progress to more severe renal impairment.

In contrast, while nausea and respiratory distress can occur in various conditions, they are not the hallmark signs of cadmium toxicity. Muscle spasms may also occur due to other factors like electrolyte imbalances, but they are not specifically linked to cadmium poisoning. Hence, kidney dysfunction stands out as the most recognized and significant symptom associated with exposure to cadmium.