One Word Substitution

DIRECTIONS : In each of the following questions, out of the four alternatives, choose the one which can be substituted for the given words/sentence.
31. A person who believes that pleasure is the chief good
  A.  Sensual
  B.  Stoic
  C.  Hedonist
  D.  Epicture
32. A government run by a dictator
  A.  Democracy
  B.  Oligarchy
  C.  Autocracy
  D.  Theocracy

33. A person who rules without consulting the opinion of others
  A.  Fanatic
  B.  Autocrat
  C.  Democrat
  D.  Bureaucrat
34. One who cannot die
  A.  Stable
  B.  Immortal
  C.  Perpetual
  D.  Perennial
35. A small piece of potato
  A.  Bit
  B.  Chip
  C.  Scrap
  D.  Chunk