Which inorganic substances are used as food by autotrophic organisms?

Autotrophic (Auto means self and trophic means nutrition) organisms make their food on their own. To make their food they require two inorganic substances carbon dioxide and water. Along with these two inorganic substances they require sunlight and chlorophyll to carry out the process of photosynthesis. A result of this process is carbohydrates (which is used by plants) and oxygen (which is given out in air).