The following image looks the same after what turn?

The given image is a triangle pointing down which has a triangle that points up. 
The image would look like this after $\frac{1}{4}$ turn:

The image would look like this after $\frac{1}{3}$ turn:

The image would look like this after $\frac{1}{2}$ turn:

The image would look like this after 1 turn:

Hence, the correct answer is option D i.e after 1 turn.