Opened the door enought that

Which are correct:

1) I opened the door enough that he could see inside the room.

2) I opened the door enough so he could see inside the room.

3) I opened the door enough so that he could see inside the room.

4) I opened the door enough for him to see inside the room.

5) He wanted to see inside the room, so I opened the door enough.

In which of the sentences 1-4, I might not have intended him to see inside the room?

Gratefully,
Navi.