During a dead ball period, A1 and B1 foul each other at approximately the same time. What will be the result of this situation?
1) Both A1 and B1 will be charged with double personal fouls
2) Only A1 will be charged with a double personal foul
3) Only B1 will be charged with a double personal foul
4) Neither A1 nor B1 will be charged with a double personal foul