Five friends $P,Q,R,S$ and $T$ went camping. At night, they had to sleep in a row inside the tent.$P,Q$ and $T$ refused to sleep next to $R$ since he snored loudly. $P$ and $S$ wanted to avoid $Q$ as he usually hugged people in sleep.

Assuming everyone was satisfied with the sleeping arrangements, what is the order in which they slept?

1. $RSPTQ$
2. $SPRTQ$
3. $QRSPT$
4. $QTSPR$

edited