6. Bob contributed to the AlphaBeta Partnership, a general partnership, a building with an adjusted basis to Bob of $50,000 and a fair market value of $150,000 that was subject to a mortgage of $120,000 in exchange for a 50 percent interest in the AlphaBeta Partnership. The AlphaBeta Partnership will assume the mortgage on the building. At the same time, Al contributed to AlphaBeta Partnership cash of $30,000 in exchange for the other 50 percent interest in the AlphaBeta Partnership. In addition to the section or sections that are relevant under question 5, above, which of the following Code Sections is or are also relevant to the determination of whether or not Bob recognizes any gain or loss on this transaction?