Moderate
Soils are also contaminated by a number of inorganic compounds which are also high toxic to human & other animals & are extremely poisonous may include:
Correct answer: D. Both A & B
- A. Arsenic & Cadmium
- B. Mercury & chromium
- C. Calcium & Magnesium
- D. Both A & B
Explanation
Arsenic, cadmium, mercury and chromium are toxic inorganic contaminants that can threaten human, animal and plant health. Calcium and magnesium are essential nutrients at normal concentrations, so both A and B are correct.
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