A partnership deed contains the terms and conditions agreed upon by all partners when forming the partnership. Since it is a mutual agreement between the partners, any alteration or modification to its clauses requires the consent of all the partners.
This principle is based on the fundamental nature of partnership as a relationship arising from an agreement. Just as the original deed was created with the consensus of all partners, any changes to it must also have unanimous approval. No partner can be bound by alterations they haven't agreed to.
The Government Authority, Registrar of Firms, or State Government have no role in deciding or approving changes to the internal agreement between partners. These are external bodies concerned with registration and compliance, not with the terms of partnership agreements.
Correct Answer: Option 3 - All the partners