Which of the following words is closest in meaning to “Warrant”?

Warrant means a written authorisation.

• Correct answer - written authorisation: it has the same meaning as Warrant.
• small payment: a minor sum of money - wrong, it does not mean the same as Warrant.
• national emergency: a crisis affecting a whole country - wrong, it does not mean the same as Warrant.
• special guard: a guard with a particular duty - wrong, it does not mean the same as Warrant.