*This 68-year-old male smoker presents with fatigue and ptosis?*

*Which of the following diseases should be considered as possible causes of his ptosis?*

A. Depression

B. Myasthenia gravis

C. Hypothyroidism

D. Syndrome of Inappropriate ADH secretion

E. Hyperthyroidism

F. Cushing's syndrome

G. Addison's disease

H. Pancoast tumor

I. Lambert Eaton syndrome