Final answer:
The question does not provide enough information to accurately calculate the heat absorbed in the oxidation of nitrogen gas.
Step-by-step explanation:
In order to calculate the heat absorbed in the oxidation of nitrogen gas, we need to use the heat of formation values for the reactions involved. However, the given question does not provide the specific reaction that is taking place, so we cannot determine the heat absorbed accurately. Therefore, none of the given options (a, b, c, d) can be considered correct.