To determine the measure of the arc or central angle, I would need additional information about the specific circle, the angles involved, or a diagram that shows how they relate to one another. It seems that the options you provided might be potential measures for an arc length or a central angle, but without more context, I'm unable to calculate or determine the correct value.
If you have a specific angle measure, arc, or additional details about the positioning of the diameters or any relevant angles, please share that information, and I'll be glad to assist you further!
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