89. Partner A contributes property worth $80,000 and a basis of $25,000 to a partnership in return for a 25% interest in the partnership. The property contributed by Partner A is encumbered with a mortgage of $40,000. Partner A executed a personal guarantee on the mortgage note. What is Partner As basis in his partnership interest?

a. 45,000

b. 65,000

c. 120,000

d. 35,000