Answer:
C. $650,000 gain.
Explanation:
Calculation to determine How much was the gain or loss on the retirement of the bonds
Using this formula
Gain or loss on retirement of bonds=Book value of bonds-Amount paid
Let plug in the formula
Gain or loss on retirement of bonds= ($10,000,000 + $500,000)-$9,850,000
Gain or loss on retirement of bonds=$10,500,000-$9,850,000
Gain or loss on retirement of bonds=$650,000 gain
Therefore the gain or loss on the retirement of the bonds will be $650,000 gain