In which of the following, all three are macronutrients?

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.