Find out the correct superlative degrees.

Q:

No other boy in the class is wiser than Sunil. (Use superlative degree.) 

• 1
  No other boy in the class is wiser than Sunil.
• 2
  Sunil is the wisest boy in the class.
• 3
  Sunil is the wisest of all the boys in the all classes.
• 4
  Sunil is wisest boy.