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.
21. Medicine which lessens pain
  A.  Balm
  B.  Antibiotic
  C.  Anodyne
  D.  Panacea
22. A story in verse
  A.  Hymn
  B.  Elegy
  C.  Ballad
  D.  Sonnet

23. A person living permanently in a certain place
  A.  Native
  B.  Domicile
  C.  Resident
  D.  Subject
24. One who uses fear as a weapon of power
  A.  Extremist
  B.  Terrorist
  C.  Militant
  D.  Anarchist
25. A short stay at a place
  A.  Halt
  B.  Intermission
  C.  Interlude
  D.  Sojourn