Final answer:
The recognized gain is $50,000 and the basis for the new building is $320,000, as the deficiency after reinvestment is less than the realized gain leading to a recalculation of the basis by deducting the unrealized gain from the FMV of the new building.
Step-by-step explanation:
The recognized gain and the basis of the new building in this scenario involving an involuntary conversion under Section 1033 can be determined by first calculating the realized gain, which is the amount realized from the insurance minus the adjusted basis of the destroyed building. In this case, the realized gain is $150,000. Then we consider the reinvestment of $400,000 in a new building which is $50,000 less than the amount realized from the insurance. Because this deficiency is less than the realized gain, only the deficiency amount is recognized. The basis of the new building is then calculated by subtracting the unrealized gain (realized gain - recognized gain) from the fair market value of the new building. Therefore, the correct answer is d. $50,000; $320,000.