Q:

In the following question, out of the four alternatives, select the alternative which best expresses the meaning of the idiom/phrase.

dark horse

• 1
  a candidate about whom little is known but who unexpectedly wins
• 2
  a good person who has been unfairly maligned
• 3
  a person despised by everybody wins
• 4
  a very unpredictable contestant, sometimes wins sometimes loses