Despite Wide Variations in Calcium Intake,serum Calcium Is Relatively Constant

Multiple Choice

Despite wide variations in calcium intake,serum calcium is relatively constant because each cell has a vital need for calcium.

A) Both the statement and the reason are correct and related.
B) Both the statement and the reason are correct but are not related.
C) The statement is correct, but the reason is not correct.
D) The statement is not correct, but the reason is correct.
E) Neither the statement nor the reason is correct.