The elements known as primary nutrients for plants

Options

A. Nitrogen, Phosphorus and Potassium
B. Nitrogen, Oxygen and Silicon
C. Potassium, Boron and Nitrogen
D. Nitrogen, Phosphorus and Iron

Answer

A

Explanation

Nitrogen (N), Phosphorus (P) and Potassium (K) are considered as the three essential or primary nutrients for plants. Together they make up the trio known as NPK. Other important nurtients are caslcium, magnetisum and sulfur.
Plants also need small quantities of iron, manganese, zinc, copper, boron and molybdenum, know as trace elements.