What’s the correct answer for this?

9.4 units.

Because,

Formula for arc length is 2times pie times radius times angle divided by 360.

The answer is option 2.

Step-by-step explanation:

You have to use length or arc formula, Arc = θ/360×2×π×r where θ represents degrees and r is radius. Then substitute the following values into the formula :

Let θ = 45,

Let r = 12,