detailed solution

Correct option is A

Element: A basic form of matter that cannot be broken down into simple substances by chemical reactions. Elements are basic constituents; these are act as building blocks of matter. Eg: Hydrogen oxygen, nitrogen, carbon etc… Compound: It is a substance compose of two or more different elements, chemically combined with one another in a fixed proportion by weight.

Example: water,${\mathrm{CO}}_2 \mathrm{etc}...$

Homogenous mixture: The mixture in which the substances are completely mixed together and are indistinguishable from one another are called homogeneous mixture. Ex: Air