Essential elements are
- Only macronutrients
- Only micronutrients
- Both macro and micronutrients
- C, H, O and N only.
Correct Answer: Option(c)
Solution: Living organisms contain relatively large amounts of oxygen, carbon, hydrogen, nitrogen and sulphur. These five elements are known as the bulk elements or macroelements. Along with these elements, sodium, magnesium, potassium, calcium, chlorine and phosphorus are also present. These six elements are known as microminerals.
Thus, the correct answers are 'Both Macro and Micronutrients.'