Answer:
b.Y-(C + I + G).
Explanation:
The net exports is determined when the import is deducted from the exports
i.e.
Net exports = Exports - imports
So according to the given situation, the first option is correct
As
GDP = Consumption + investment + government purchase + net exports
Here
GDP be Y
Consumption be C
Investment be I
Government purchase be G
So, the correct option is a.