If, in a liquidation to which section
331 applies, the shareholder receives (in exchange for the shareholder’s stock) an installment obligation acquired in respect of a sale or exchange by the corporation during the 12-month period beginning on the date a plan of complete liquidation is adopted and the liquidation is completed during such 12-month period, then, for purposes of this section, the receipt of payments under such obligation (but not the receipt of such obligation) by the shareholder shall be treated as the receipt of payment for the stock.