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.
6. A person who regards the whole world as his country
  A.  Nationalist
  B.  Patriot
  C.  Metropolitan
  D.  Cosmopolitan
7. A room leading into a large room or hall
  A.  Lobby
  B.  Pantry
  C.  Anteroom
  D.  Lounge

8. Words written on a tomb
  A.  Epigraph
  B.  Epithet
  C.  Epitaph
  D.  Soliloquy
9. A person who has just started learning
  A.  Apprentice
  B.  Novice
  C.  Accomplice
  D.  Foreman
10. Custom of having many wives
  A.  Monogamy
  B.  Polygamy
  C.  Matrimony
  D.  Bigamy