A person who is unable to see, even with perfectly healthy eyes, or unable to walk, despite no apparent physical injury, may be suffering from which of the following?

The correct answer is Hysteria

Hysteria or hysterical neurosis is a psychoneurosis characterized by transient changes in consciousness, such as periods of amnesia or memory loss, and various transient sensory or motor manifestations, such as tics, loss of skin sensitivity, limb paralysis, blindness or convulsions.