Identify the INCORRECTLY spelt words in the given sentence and select the option that rectifies it. The comparitive study of tariffs exposed discrepancies in foriegn exchange and econimic forecasting.

1. The comparative study of tariffs exposed discrepancies in foreign exchange and economic forecasting.
2. The comparative study of tariffs exposed descrepancies in foriegn exchange and economic forecasting.
3. The comparitive study of tarrifs exposed descrepancies in foriegn exchange and econimic forecasting.
4. The comparitive study of tariffs exposed discrepancies in foreign exchange and econimic forecasting.