Correct answer: Congenital hip luxation. There are two clues in the picture: first, there's a skin fold near the child's groin that is characteristic in this condition. Also, it can be seen that the examiner performs the Ortolani maneuver. Congenital hip luxation is a condition with a complex etiology, in which there's an increased resilience of the joint structures. It must be recognised early, otherwise permanent malformation of the joint can occur.