PLEASE ANSWER ASAP WILL MARK BRAINLIEST!!! Which of the following most likely explains why the chemical symbol for calcium is Ca?

a.) The symbol C was already used for carbon.

b.) The symbol was assigned by modern alchemists.

c.) Calcium is made of more than one type of atom.

b

Explanation:

the element is named after the latin word for calcium 'calx'

the sugar-phosphate backbone forms the structural framework of nucleic acids, including dna and rna. this backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.

answer; the tunica intima also called tunica interna, consists of elastic fibers,connective tissue and smooth muscle cells;