Which one of the following is not correct :
(a) The minerals, particulary Ca2+, K+ and Na+ maintain the permeability of cytomembranes
(b) Minerals like Cu, As, impart toxic effect on the proplasm under specific condition
(c) Several elements particularly Fe, Ca. Mg, Zn, Cu, Cl act as metallic catalyst in biochemical reactions
(d) Mg, K and Ca are essential microelements
Correct Option (d) Mg, K and Ca are essential microelements