Answer:
a. $0 gain or loss; $30,000 basis.
Step-by-step explanation:
Since the partnership is being liquidated, Landis doesn't have to recognize any gain or loss resulting from the liquidation because the cash amount that he is receiving is less than his partnership interest. The asset's basis = $120,000 - $90,000 (cash) = $30,000, regardless of its current market value or prior basis.