Answer the question based on the following information.
Ten coins are distributed among four people P, Q, R and S such that one of them gets one coin, another gets two coins, the third gets three coins and the fourth gets four coins. It is known that Q gets more coins than P, and S gets fewer coins than R.
If Q gets fewer coins than R, then which one of the following is not necessarily true?
- P and Q together get at least four coins.
- Q and S together get at least four coins.
- R and S together get at least five coins.
- P and R together get at least five coins.