This is actually so tricky. My instinct said “right hand side would be impractical, so no way” but then I remembered they evolved long necks to get to food so it makes sense to evolve arms there to better feed themselves.
::: spoiler My little cope against this is:
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Centaurs use their arms to wield and craft weapons. This would make them much better suited for the left hand option, where they can try for body strikes against centaurs rather than just decapitation. It would also make them actually useful against any foes which aren’t birds.
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From an evolutionary and physiological standpoint, arms growing out of your neck is unrealistic. You don’t have the structural components to support it there - the neck is too busy supporting the head and it’s pretty crowded up there. Arms are typically attached to a broadened torso-skeleton, built to support lateral attachments as well as the longitudinal attachment of a head and neck. :::
Edit: Ah, but it seems I haven’t paid enough attention to the illustration. Centaur on the right actually has a mega torso as it’s neck, which renders cope #2 as obsolete.
Well, I find it hard to believe that the centiraffe would be forced to waste resources on growing a mega ribcage and mega long sternum like that. Also, it’s kind of just not “in the spirit of the game” - no longer does he resemble a giraffe, whose defining feature is the mega neck, but now he resembles just a very tall centaur. Horses are not short giraffes.
Still going with option A.