A list consists of $n$ integers.\\
Consider the following statements:\\
P: $\quad n$ is odd.\\
Q: The median of the list is one of the numbers in the list.\\
Which one of the following is true?
A P is necessary and sufficient for Q.\\
B P is necessary but not sufficient for Q.\\
C P is sufficient but not necessary for Q.\\
D P is not necessary and not sufficient for Q.