Calcium and phosphorus are both essential for the proper growth of

a.) bones
b.) hair
c.) fingernails
d.) all of the above

Calcium and phosphorus are two of the most essential nutrients in the growth of bones. The answer is A. Aside from the bones, these two elements are also important in the strength of the teeth. Because they are present in the bones, these two elements ranked 1 and 2, respectively, in the most abundant mineral in the body. 

Calcium and phosphorus are both essential for the proper growth of .A.) bones 

Yes yes yes very good