The determination of whether a fair value measurement is categorised into Level 2 or 3 depends onI The observability of the inputs used in the valuation techniqueII The significance of the inputs used

The correct answer is C: I and IV.

The determination of whether a fair value measurement is categorized into Level 2 or 3 depends on the observability of the inputs used in the valuation technique (I) and whether similar transactions take place with sufficient frequency and volume (IV). The significance of the inputs used to the fair value measurement (II) and the valuation technique used (III) are not the primary factors in determining the categorization.