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The left turn in the case of the vehicles which enter an intersection circulating on the same road, in alignment (in a straight line) and from opposite directions, is carried out to the left of the centre of the intersection, without their trajectories intersecting. This manoeuvre allows each vehicle to turn safely, avoiding any conflict point in the middle of the intersection and ensuring a smooth traffic flow.

And in the situations in which there are special lanes for the left turn, as in the image of this question, the change of direction is made to the left of the imaginary centre of the intersection, without the trajectories of the vehicles intersecting, and if there is a guiding marking which indicates the trajectory to be followed, it must be respected. The practice of bypassing the imaginary centre of the intersection on the right, so that the vehicles turn one behind the other and intersect their trajectories, is incorrect and may create additional risks of collision and confusion among the road users.

The correct answer is: A

Recommendations:

Traffic in intersections - Audio-Video Lesson --> Road Traffic Code - Traffic in intersections

The meaning of all road markings - Audio-Video Lesson --> Road Traffic Code - Road markings

The direction and the traffic lane - Audio-Video Lesson --> Road Traffic Code - The direction and the traffic lane

Regulation** - Article 80

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(2) The guiding markings have the role of materialising the trajectory which the vehicles must follow when crossing an intersection or for carrying out the left turn, being mandatory to be made when the central axis or the lane separation lines are not collinear.
[...]

Regulation** - Article 110

(1) In the situations in which there are special lanes for carrying out the manoeuvre, the change of the direction of travel is made to the left of the imaginary centre of the intersection, and if there is a guiding marking, with the observance of its meaning.
(2) The change of the direction of travel to the left, in the case of the vehicles which enter an intersection circulating on the same road in alignment, but from opposite directions, is carried out to the left of the centre of the intersection, without the intersection of their trajectory.
[...]

** Regulation = REGULATION for the implementation of OUG 195/2002 updated (The Road Traffic Code Regulation)