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.
51. A person who interested in reading books and nothinh else
  A.  Scholar
  B.  Book keeper
  C.  Student
  D.  Book worm
52. A song sung at a burial
  A.  Dirge
  B.  Ode
  C.  Ballad
  D.  Elegy

53. Policy of a political party
  A.  Report
  B.  Circular
  C.  Agenda
  D.  Manifesto
54. A sea bounding in islands
  A.  Gulf
  B.  Ocean
  C.  Strait
  D.  Archipelago
55. A short walk for pleasure or exercise
  A.  Jog
  B.  Gallop
  C.  Promenade
  D.  Stroll