Solution with Explanation:

A partnership deed is a written agreement among partners that defines the terms and conditions of the partnership. If any changes need to be made to the deed, the Partnership Act, 1932 states that:

• Changes in the partnership deed require the consent of all partners.
• A majority decision is not sufficient.
• The Registrar of Companies does not have the authority to modify the terms.
• The partnership deed can be altered if all partners agree.

Thus, the correct answer is:
 (c) On the basis of all the partners’ consent.