Question

One of the following is a non essential element which counteract the toxicity of copper and stimulate
plant growth.
(A) Silica
(B) Aluminium
(C) Sodium
(D) Nickel​

Answer 1

These elements include aluminum, arsenic, boron, bromine, cadmium, chromium, fluoride, germanium, lead, lithium, nickel, rubidium, silicon, strontium, tin, and vanadium.

nickel is your answer