What does this sign indicate?
A)It requires you to continue straight ahead.
B)Road with two-way traffic.
C)It requires you to give way to traffic coming from the opposite direction.Correct
The sign in the question prohibits entry into a narrow passage when it is not possible to pass through it without forcing vehicles travelling in the opposite direction to stop, therefore requiring you to give way to traffic coming from the opposite direction.
On the other side of the narrowing, you will find the sign (photo 1) priority over the opposite direction, which gives you right of way in the narrow passage.
The sign in photo 2 indicates a road with two-way traffic.