Your road has a dividing strip. Along path Բ, you would turn on the oncoming side of the road you are crossing, so with right-hand traffic, only path Ա is allowed.
Having taken the far-left position in advance (clause 40), the driver must keep in mind that their own road has a dividing strip (a grassed area), which splits it into two separate roadways. Under the rules of right-hand traffic (clause 2), the maneuver must be made so that, when leaving the crossing of the roadways, the vehicle does not end up on the oncoming side (clause 41). A U-turn along path Բ (the short one) would mean turning on the oncoming side of the road being crossed. Therefore, to avoid oncoming traffic, the U-turn must be made only along path Ա, after passing the center of the intersection.
Option 2. Path Բ unlawfully takes the vehicle onto the oncoming side of the road being crossed.
Option 3. Only path Ա is allowed, because path Բ breaks the rules of right-hand traffic at the intersection.