The correct answer is A. Minor partner.
A minor is a person who is under the age of majority, which is 18 in most jurisdictions. Minors are not allowed to enter into contracts, including partnership agreements. Therefore, a minor cannot be a partner in a partnership.
A sleeping partner is a partner who does not participate in the management of the partnership but who still has liability for the partnership’s debts. A nominal partner is a partner who is listed as a partner on the partnership’s records but who does not actually participate in the partnership’s business. An inactive partner is a partner who does not participate in the management of the partnership but who does have liability for the partnership’s debts.
In conclusion, a minor is not a partner because they are not allowed to enter into contracts. A sleeping partner, nominal partner, and inactive partner are all partners because they have liability for the partnership’s debts.