Which human characteristics are passed on by inheritance?
- Ablood group ✓, eye colour ✓, language \times, sex ✓
- Bblood group ✓, eye colour ✓, language ✓, sex \times
- Cblood group \times, eye colour ✓, language \times, sex ✓
- Dblood group ✓, eye colour \times, language ✓, sex ✓