Major inorganic components of vertebrate bone is

The correct option/answer is calcium phosphate.

Vertebrate bone is a specialized connective tissue that consists of both organic and inorganic components. The organic matrix is primarily composed of collagen fibers, which provide flexibility and tensile strength. The inorganic mineral phase, which makes up about 60% to 70% of the dry weight of the bone, is responsible for providing hardness and rigidity to the skeletal system.

The major inorganic component of vertebrate bone is a crystalline form of calcium phosphate known as hydroxyapatite. The chemical formula for hydroxyapatite is:
$${\mathrm{Ca}}_{10}{\left({\mathrm{PO}}_4\right)}_6{\left(\mathrm{OH}\right)}_2$$

These hydroxyapatite crystals insert themselves into the collagen fiber matrix, forming a composite material that can withstand significant mechanical stress. While bone also contains small amounts of other inorganic compounds like calcium carbonate, sodium, magnesium, and fluoride, calcium phosphate in the form of hydroxyapatite remains the predominant mineral component.