equivalent fraction please help this is my state test. one of the questions

a cookie requires 1\2 cup of sugar. whitch is equivalent to 1\2

2\3?

3\5?

4\8? or

6\10

$\dfrac{1}{2} \cdot \dfrac{4}{4} = \dfrac{1\cdot 4}{2\cdot 4}\\\\ \mathbf{=\dfrac{4}{8}}$

Thank you 

Thank you