Let $G$ be a simple, unweighted, and undirected graph. A subset of the vertices and edges of $G$ are shown below.

It is given that $a-b-c-d$ is a shortest path between $a$ and $d ; e-f-g-h$ is a shortest path between e and $h ; a-f-c$ - $h$ is a shortest path between $a$ and $h$. Which of the following is/are NOT the edges of $G$ ?