Answer: Option (A) is the correct answer.
Explanation:
A substance that consists of two or more elements which are chemically combined together and cannot be distinguished by individual properties of its elements is known as a compound.
For example, water is a compound and has chemical formula [tex]H_{2}O[/tex]. Water is non-flammable and non-combustible in nature whereas its elements hydrogen is extremely flammable and oxygen supports combustion.
Thus, we can conclude that in a compound classification of matter includes material that can no longer be identified by their individual properties.
