Which of the Following Matched Pairs of Elemental Names and Chemical

Multiple Choice

Which of the following matched pairs of elemental names and chemical symbols is properly labeled?
I. Magnesium, Mg
II. Mercury, M
III. Silver, Si
IV. Sodium, S
V. Oxygen, O

A) I only
B) II and III
C) I and V
D) I, IV and V
E) All are properly labeled