challenge: What are the primary characteristics of Tucker syndrome?
  
  A. Congenital unilateral ptosis and bilateral recurrent laryngeal nerve paresis
  B. Congenital bilateral ptosis and recurrent laryngeal nerve paresis, as well as short stature
  C. Unilateral ptosis and unilateral recurrent laryngeal nerve paresis
  D. Acquired bilateral ptosis and unilateral recurrent laryngeal nerve paresis
  Answer: 