Answer: D.neither physically nor chemically changed.
Explanation:
A physical change is defined as a change in which there is alteration in shape, size etc. No new substance gets formed in these reactions.
Example: Melting of ice
A chemical change is defined as a change in which a change in chemical composition takes place. A new substance is formed in these reactions.
Example: Corrosion of iron
As the inside of the nail was still shiny and in same phase, that means it has not undergone any physical or chemical change.
