Question

Which of the following is not a beneficial element?

• A. Na
• B. CO
• C. Si
• D. All of the above

Answer 1

Answer: (D)

All of the above

The minerals needed by plants for maintaining the growth and completing the life cycle are called beneficial or essential elements. Sodium(Na), Cobalt(Co), Silicon (Si), and Selenium (Se) are the non-beneficial elements.

So, the correct answer is 'All of the above'.