Sunita draws a line segment $AB$ of length $16 cm$. She then draws three-line segments of equal length, which cross $AB$ as shown in the figure below.

Points $O, P, Q$ are the mid-point of line segments $CD, EF$ and $GH$respectively

Line segments $EF$ and $GH$ are parallel to $CD$. The measure of $\angle COB = 90°$.

Which of the following is true for line segments $EF$ and $GH$?