Select the option that contains a grammatical error in the underlined portion.
No sooner had I sat down that there was a loud knock on the door.
1
No sooner had I sat down that there was a loud knock on the door.
2
No sooner had I sat down that there was a loud knock on the door.
3
No sooner had I sat down that there was a loud knock on the door.
4
No sooner had I sat down that there was a loud knock on the door.