A 32 years old who is recently divorced visits to the physician for visual disturbances. The patient complains of trouble vision for last 3 days. On examination, tunnel vision is detected along with marked weakness of plantar flexion.

Although, the patient can walk on tip test without any complaint all laboratory tests and imaging studies are normal. What is the most likely diagnosis? Conversion disorder Meningioma Multiple sclerosis Transient ischemic attack