Select the correct passive form of the given sentence.
If the police had not detained the culprit, he would have fled instantly.
1
If the culprit had not been detained, he will have fled instantly.
2
If the culprit had not been detained, he would have fled instantly.
3
If the culprit had not been detained, he would have flee instantly.
4
If the culprit had not been detained, he would had fled instantly.