Select the correct indirect form of: He said, 'I would have helped you if I could.'

1. ক
   He said that he would have helped me if he could.
   
2. খ
   He said that he would have helped me if he had been able to.
   
3. গ
   He said that he would help me if he could.
   
4. ঘ
   He said that he would have helped me if he could have.