Which is the correct positive form of: 'The Padma is longer than the Jamuna'?

1. ক
   The Jamuna is not as long as the Padma.
   
2. খ
   The Jamuna is as long as the Padma.
   
3. গ
   The Padma is not so long as the Jamuna.
   
4. ঘ
   The Jamuna is the longest river.