A body of weight $W$ hangs from a newton meter. When the body is fully submerged in water, the newton meter gives a reading of $P$. When the body is fully submerged in oil, the newton meter gives a reading of $Q$. Find the ratio $\frac{\text{density of oil}}{\text{density of water}}$?
- A$\frac{W - P}{Q - P}$
- B$\frac{Q - P}{W - P}$
- C$\frac{W - P}{W - Q}$
- D$\frac{W - Q}{W - P}$