Answer: Option (A) is the correct answer.
Step-by-step explanation:
A compound is a substance which contains two or more different atoms combined together.
Sodium is found as sodium chloride in nature. Sodium chloride is also known as common salt.
As it contains a sodium atom combined to a chlorine atom, therefore, it is a compound.
Thus, we can conclude that sodium is the element that is found in nature only in compounds.