B- You really think that? if so study Pathology(or Anatomy(especially neuro) Pharmacology or Pathophysiology), I'll give you an exam and I DARE you to pass it without memorizing (unless you're like super lucky at choosing answer if exam is multi choice). Also, I'm not studying to be a Physician (medical field has many jobs you know). I'm studying to be a Medical Laboratory Scientist.
C- After re-checking it wasn't like you said, but similar. (hard question, simply answer)
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B- Well if you enjoy a subject/major, GO FOR IT, as long as you're INTO IT, go FOR IT, PURSUIT IT LIKE A TYRANITAR PURSUITING A LUCARIO, oh wait... ANYWAY you get the point.