The diagram below shows an instantaneous position of a string as a transverse progressive wave travels along it from left to right. Which one of the following correctly shows the direction of the velocity of the points 1, 2 and 3 on the string

Particle velocity $(v_p)=-v\times$Slope of the graph at that point

At point 1 : Slope of the curve is positive, hence particle velocity is negative or downward ($\downarrow$)

At point 2 : Slope negative, hence particle velocity is positive or upwards ($\uparrow$)

At point 3 : Again slope of the curve is positive, hence particle velocity is negative or downward ($\downarrow$)