This sign indicates that the road ahead:

Turns sharply right, then left.
Curves right, then left.
Curves right.
The Correct Answer and Explanation is :
The sign you mentioned indicates that the road ahead curves right, then left. This is known as a reverse curve sign, which is used to warn drivers of two consecutive curves in opposite directions.
Reverse curve signs are essential for drivers to slow down and prepare for the change in direction. They are typically placed on roads where the path transitions sharply, ensuring the driver remains in control while navigating the curves. This type of warning helps prevent accidents by giving drivers time to adjust their speed and steering accordingly.
Reverse curves are often found in areas where the road twists through hilly or mountainous terrain, or in urban settings with winding roads. Without such a sign, drivers may not be able to react in time, especially if the curves come up quickly.
Properly understanding these signs and taking appropriate actions when approaching them can significantly reduce the risk of accidents and improve overall road safety.