Shareholder D transfer a building to K Corporation that has a basis of $50,000 and fair market value of $150,000 in exchange for stock with a fair market value of $60,000, cash of $30,000 and other property worth $60,000. What was the amount of gain realized, if any, by D on this transaction:

a. $60,000 b. $90,000 c. $100,000 d. $150,000