*$_Which of the following does not come under the category of'primary nutrient' for plant growth??

*$_Which of the following does not come under the category of'primary

1.	*$_Which of the following does not come under the category of'primary nutrient' for plant growth??
A.	Potassium
B.	Nitrogen
C.	Phosphorous
D.	Sulphur
Answer» E.