What applies at this junction?

You answered correctly. The sign on the right is a "give way" sign, but it is not facing you—it is for the traffic from the right. That means you have priority at the junction. There are no signs or markings restricting your direction, so you are allowed to cross straight through. This is why "cross the junction" is correct. Turning left or right is not required; you may drive straight ahead. Always check signs and markings at intersections to determine right of way.