Which row gives the best description of human blood groups?
- Aaffected by environment ✓, has no intermediate phenotypes ✗, shows continuous variation ✓, shows discontinuous variation ✗
- Baffected by environment ✓, has no intermediate phenotypes ✗, shows continuous variation ✗, shows discontinuous variation ✓
- Caffected by environment ✗, has no intermediate phenotypes ✓, shows continuous variation ✓, shows discontinuous variation ✗
- Daffected by environment ✗, has no intermediate phenotypes ✓, shows continuous variation ✗, shows discontinuous variation ✓