I have attached screenshots for the complete question as well as the diagram associated with it.
Answer: point C
Explanation: A plane and a line can either: 1- have no intersection 2- intersect in a point 3- intersect in a line in case the whole line is found in this plane
For the given: We can see that line CG does not belong to the plane ABCD, however, they both intersect. This means that the intersection between them is a point. We can note that the only point common between the line and the plane is point C. Therefore, plane ABCD intersects line GC at point C
