Here's why:
* Organic chemistry focuses on the study of carbon-containing compounds, which are the building blocks of life.
* Inorganic chemistry encompasses all other elements and their compounds, including minerals, salts, metals, and non-metals.
While the other options you provided are branches of chemistry, they are not directly related to the definition of inorganic chemistry:
* Physical chemistry studies the physical principles underlying chemical phenomena.
* Biochemistry focuses on the chemistry of living organisms.
* Analytical chemistry is concerned with the identification and quantification of chemical substances.
