The option that is going to be the best choice for Ahmad and his friend is the  Limited liability Partnership.
This is because if the partnership is formed, no partner is going to be liable for the conduct or the negligence of the other person.
Each of the members is not going to be held liable in a way that is more than the share that they have.
The LLP is also going to reduce the tax liability that he has. Therefore this option is the best for him.
Read more on Limited Liability partnership here: https://brainly.com/question/25012970