| a | Iron | i | Photolysis of water |
| b | Zinc | ii | Pollen germination |
| c | Boron | iii | Required for chlorophyll biosynthesis |
| d | Manganese | iv | IAA biosynthesis |
| 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 |