Section 303 Redemption

A Section 303 redemption is most likely appropriate for which of the following estates?

1. At Fred’s death, Fred owned all of his assets including the stock of a closely held corporation in Joint Tenancy WROS with his wife.
2. Before Gloria’s death, she transferred all of her assets including the stock in a closely held corporation to an irrevocable family trust.
3. By will, Hank bequeathed his stock in a closely held corporation to his daughter.
4. Before her death, Irene sold her stock in a closely held business to her son by an installment sale.