In which of the following, all three are macronutrients?

Step-by-step solution

Macronutrients are required in the greater amount which is 1 mg-gram of plant dry weight. The macronutrients include: • Carbon (C) • Hydrogen (H) • Oxygen (O) • Nitrogen (N) • Phosphorus (P) • Potassium (K) • Calcium (Ca) • Magnesium (Mg) • Sulfur (S) The first three—carbon, hydrogen, and oxygen—are known as structural elements and are present in the atmosphere and growing environment.