Correct option is C
The fit designation 25H7/p6 follows the ISO system of limits and fits, where:
· 25 → Nominal diameter of the hole and shaft (in mm).
· H7 → Hole tolerance (H means the lower deviation is zero, and 7 represents the tolerance grade).
· p6 → Shaft tolerance (p indicates the shaft is always larger than the hole, leading to an interference).