Q. Which of the following elements is considered as beneficial elements in higher plants?
A) Sodium and iron
B) Silicon and potassium
C) Cobalt and selenium
D) All of these
Explanation
Cobalt and selenium. The number of essential elements known for the growth and reproduction of plants is 17
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.