This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neurotic, Stress Related and Somatoform Disorders, Subject name: Psychiatry
All are true about conversion disorder except: 
Select and explain. 
A. Presence of secondary gain, B. Onset in late age, C. Patient does not consciously produce symptom, D. Relation with stress
B: Onset in late age
Answer: B: Onset in late age 
Explanation: The onset of conversion disorder is usually seen in late childhood to early adulthood and is rare after 35 years of age. Conversion disorder(functional neurological symptom disorder) 1. Sudden, dramatic loss of sensory or motor function (e.g., blindness, paralysis), often associated with a stressful life event. 2. Patients appear relatively unworried ("la belle indifference")