Correct Answer: Option A

Explanation

When a zinc rod is immersed in a copper (II) tetraoxosulphate (VI) solution (commonly known as copper sulphate solution), a chemical reaction occurs where the zinc displaces the copper ions in the solution, resulting in a reddish-brown coating of copper metal depositing on the zinc rod while the solution loses its blue colour as zinc sulphate is formed; this is a classic example of a displacement reaction. 

There is an explanation video available below.

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