| 1. | Protonema and gametophyte stage, both of which are diploid. |
| 2. | Sporophyte and gametophyte stages, with the gametophyte being diploid. |
| 3. | Protonema stage and leafy stage, both being parts of the gametophyte. |
| 4. | Leafy stage and sporophyte stage, both independent and diploid. |