Identify the superlative form of: 'A wise enemy is better than a foolish friend.'

1. ক
   A wise enemy is the best than a foolish friend.
   
2. খ
   A wise enemy is the best of all friends.
   
3. গ
   The sentence cannot be changed into superlative.
   
4. ঘ
   A wise enemy is more better than a foolish friend.