Answer: Expulsion of a partner who has transferred his transferable partnership interest.
Explanation:
A partner can be expelled rightfully if it is done in accordance with the partnership agreement.
It is also fine to expel a partner if the Court orders the expulsion on advice it other partners.
Expelling a partner with whom it is unlawful to carry out business with is also fine because it is affecting the business negatively.
The correct answer must therefore be; expelling a partner who transferred their transferable partnership interest.