Soil contamination can occur due to various inorganic substances that are highly toxic to humans and animals. Which of the following groups includes such hazardous elements?

Explanation

Soils can be polluted by several inorganic elements that pose serious toxicity risks to humans and animals. Arsenic and Cadmium, as well as Mercury and Chromium, are well-known toxic heavy metals contributing to such contamination. In contrast, Calcium and Magnesium are essential nutrients and not considered highly toxic in this context. Therefore, the correct answer includes both groups of toxic metals mentioned.