GRAMMAR HELP : Plz correct these sentences

As soon as sun rose , we left .
(1.Immediately after 2. no sooner than 3. No sooner did 4. no sooner had 5. Hardly had)

1. we left immediately after sun rose
2. no sooner than sun rose we left
3. NO sooner did we leave than the sun rose
4. No sooner had the sun risen, than we left...
5. Hardly had the sun risen, that we left...