Answer:
B)$330,000
Explanation:
Jeff contribute
cash 50,000
land 310,000
with a mortgage of 30,000
Total contribution
assets    360,000
liabilities   (30,000)
total      330,000
The entry to record the land will be:
Land 310,000
          Mortgage payable    30,000
          Jeff Capital Account 280,000
The land is recorded, the parthnership assumes the mortage and the remainder goes into Jeff Capital Account.