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You could major in Biology.
PDOC. Pdoc is a compressed phrase combining psychiatrist/psychologist and doctor. It is jargon or slang for psychiatrist.
Depending on the type of psychiatrist. Some psychiatrist strictly stay in one area.
Psychiatrist who is teaching in medical college in Secunderabad or Hyderabad can be considered best psychiatrist.
No, "a psychiatrist" is a person not a field.