| a | Homo habilis | i | 900 cc |
| b | Homo neanderthalensis | ii | 1350 cc |
| c | Homo erectus | iii | 650-800 cc |
| d | Homo sapiens | iv | 1400 cc |
| Pair of skeletal parts | Category | |
|---|---|---|
| (a)$\,\,$ | Sternum and ribs$\,\,$ | Axial skeleton |
| (b)$\,\,$ | Clavicle and glenoid cavity$\,\,$ | Pelvic girdle |
| (c)$\,\,$ | Flumerus and ulna$\,\,$ | Appendicular skeleton |
| (d)$\,\,$ | Malleus and stapes$\,\,$ | Ear ossicles |