Step 1: Note the symbol code.
$+$ means son of, $-$ means wife of, $\times$ means brother of, $\div$ means mother of, $=$ means sister of.
Step 2: Split the expression.
We decode $P + R - Q$ from left to right in two links.
Step 3: Decode the first link.
$P + R$ means P is the son of R, so R is a parent of P and P is male.
Step 4: Decode the second link.
$R - Q$ means R is the wife of Q, so R is female and Q is her husband.
Step 5: Connect Q to P.
R is P's parent and is married to Q, therefore Q is also a parent of P. As Q is male, Q is the father of P.
Step 6: Choose the option.
The statement "Q is the father of P" matches.
\[ \boxed{\text{Q is the father of P}} \]