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    Question

    Which of the following metals are toxic to humans even

    at low concentrations Options: 1. Arsenic 2. Lead 3. Iron 4. Selenium
    A Options 1, 2 & 3 are correct Correct Answer Incorrect Answer
    B Options 1 & 2 are correct Correct Answer Incorrect Answer
    C All the options (1, 2, 3 & 4) are correct Correct Answer Incorrect Answer
    D All the options (1, 2, 3 & 4) are incorrect Correct Answer Incorrect Answer

    Solution

    The correct answer is B

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