Which situation does NOT involve solidary liability of the partnership for a partner's wrongful act?

In the context of partnership law, solidary liability, also known as joint liability, means that all partners in a partnership can be held liable for wrongful acts committed by one partner during the course of partnership activities. This ensures that third parties can seek redress from any partner for losses resulting from the actions of any partner.

The situation involving negligence occurring outside of partnership activities does not involve solidary liability because it is not connected to the business of the partnership. For a partner's wrongful act to impose liability on the partnership and hence invoke solidary liability, the act typically needs to have a direct relation to the partnership's business and operations. When a partner engages in negligent conduct unrelated to the partnership's affairs or outside the scope of their work, the partnership itself is not liable. This allows for the distinction between personal conduct of partners and acts that are within the purview of the business.

In contrast, the other scenarios involve wrongful acts directly related to the partnership's business operations, where the partnership holds liability due to the partner's actions taken in a partnership capacity. Thus, they fall under the framework of solidary liability due to their relevant connection to partnership activities.