The symbol of Calcium is

A chemical element called calcium may be found in the periodic table's second group. It is one of the metals found in alkaline earth. It has an atomic mass of 40 and an atomic number of 20. It is represented by the letter Ca. It is a highly reactive metal that reacts with air to produce a black oxide-nitride layer.

Atomic symbol: Most of the symbols are the same as the names of the elements, although other symbols have Latin roots. Using the Latin word "Argentum" as a sign, silver, for instance, is represented as Ag.
Another illustration is the symbol "Fe," which stands for iron and is derived from the Latin word "Ferrum," which means "iron."
The Latin word calx, which means "lime," served as the inspiration for the name of this reactive silvery metallic element, which may be found in Group 2 of the periodic chart.

Hence, the correct answer is option A.