Direction: Choose the option that best transforms the given sentence without changing its meaning:
As soon as the security guard saw the thief, he swung into action.
1
No sooner had the security guard seen the thief when he swung into action.
2
No sooner did the security guard see the thief then he swung into action.
3
No sooner did the security guard see the thief than he swung into action.
4
No sooner had the security guard seen the thief, he swung into action.
5
Question Not Attempted