Choice "A" is correct. Gain or loss from the S corporation's sale of collectibles is separately reported on the Schedule K-1 of IRS form 1120S.Choice "d" is incorrect. The S corporation's mark-to-market income is part of "ordinary business income (loss)," which is separately stated on the Schedule K-1 of IRS form 1120S. However, the various components of "ordinary business income," such as mark-to-market income, are not separately stated on the K-1 of IRS form 1120S.Choice "b" is incorrect. The S corporation's unearned revenue is not separately stated but is a component of "ordinary business income" or "net rental real estate income (loss)" or "other net rental income (loss)," each of which is separately stated on the Schedule K-1 of IRS form 1120S. However, the various components (such as unearned revenue) of "ordinary business income," "net rental real estate income (loss)," and "other net rental income (loss)" are not separately stated on the K-1 of IRS form 1120S.Choice "c" is incorrect. The S corporation's section 1245 gain (and section 1250 gain) is not separately stated but is a component of "ordinary business income" or "net rental real estate income (loss)" or "other net rental income (loss)," each of which is separately stated on the Schedule K-1 of IRS form 1120S. However, the various components (such as section 1245 gain) of "ordinary business income," "net rental real estate income (loss)," and "other net rental income (loss)" are not separately stated on the K-1 of IRS form 1120S.