In the 2015 Financial Year James Has Recently Turned 53

In the 2015 financial year James has recently turned 53 years of age. He works part-time for a large corporation earning $20,000 p.a. including his employer's contribution under the superannuation guarantee scheme and salary sacrifices 100% of his salary into superannuation. James has just sold an investment property and has an assessable capital gain of $250,000 in the 2015 financial year. What is the maximum tax deduction he can claim for personal superannuation contributions in the current year?

A) $35,000
B) $25,000
C) $15,000
D) $150,000