Sue Smith transferred a building that had an adjusted basis to her of $75,000 and a fair market value of $150,000 to Jumbo Corporation solely in exchange for 100 percent of Jumbo's only class of stock. The building was subject to a mortgage of $100,000, which Jumbo assumed for bona fide business purposes. The fair market value of the stock at the date of transfer was $50,000. What is Sues basis of stock?

a.25,000

B.50,000

c.75,000

d. 100,000