Which of the following is correct statement/statements regarding inorganic nutrients in plants?
(a) N, S and Fe are macronutrients
(b) O, Ca and Mg are Micronutrients
(C) Cu, Zn and Mn are essential elements
(d) B, Mo and Cl are non-essential elements
1
(a) only
2
(a) and (b)
3
(a) and (c)
4
Only (c)