Which of the following is not one of the three plants macronutrietns included in most fertilisers?

Options

A. O
B. N
C. P
D. K

Answer

A

Explanation

Three important macronutrients included in most fertilisers are nitrogen, phosphorus and potassium. These are need to be replenished in crop fields as they are depleted by repeated cultivation. Oxygen is not one of these three elements.