Trilobitlar qaysi hayvonlardan kelib chiqqan?

1. eng qadimgi kam tukli halqali chuvalchanglardan
2. eng qadimgi ko’p tukli halqali chuvalchangladan
3. eng qadimgi yassi chuvalchangladan
4. eng qadimgi bo’shliqichlilardan
5. eng qadimgi bo’g’imoyoqlilardan