You intend to go straight ahead, and the driver of the oncoming vehicle intends to turn left. Are you obliged to yield the right of way to him?

In this situation, the A-7 'give way' sign is visible along with the T-6c plaque, which indicates the course of the priority road. The bold line on the diagram shows that the priority road comes from the opposite direction and turns to your left. Since the vehicle approaching from the opposite direction is on the priority road and you are on a minor road, you are obliged to yield the right of way to it, regardless of your further direction of travel.