What is the name of the green segment in the hyperbola below?

Answer:
Option (A).
Step-by-step explanation:
In the figure attached a hyperbola has been given with a line passing through vertices.
By the definition,
"Major axis of a hyperbola is a line that passes through the center, foci and vertices of the hyperbola."
Therefore, green segment in the given hyperbola will be Major axis.
Option (A) will be the answer.