Concept:Dissolution of partnership takes place when the legal relationship among partners comes to an end due to a valid reason under law or the partnership deed.
Explanation:A partnership can be dissolved on grounds like mutual consent, expiry of the agreed duration, completion of the venture, death or insolvency of a partner, or a court order.
Continuous disagreement among partners can make the business unworkable and may lead to a court-ordered dissolution.
However, the expiration of a business year is simply the end of an accounting period.
It does not terminate the partnership, as partners can continue the business into the next financial year.
So, the option that is not a valid condition for dissolution is expiration of a business year.
Answer:B. Expiration of a business year