In the context of accountancy, when a new partner is admitted into a partnership, the general reserve, which appears on the old balance sheet, needs to be addressed. The general reserve is an accumulated reserve created from the profits over the years. Upon admission of a new partner, it is vital to distribute the existing general reserve among the old partners as per their old profit-sharing ratio before the new partner's entry.
Here is why the general reserve is transferred to the Old Partners' Capital Accounts:
Therefore, the correct answer is: Old Partner's Capital A/C.