I tried added a simple array to a keyboard component, but that didn’t work.
So, I recommend using some simple code instead.
Put the following in End Routine
if 'y' in key_resp.keys or 'n' in key_resp.keys:
thisExp.addData('Score',1)
else:
thisExp.addData('Score',0)
Replace ‘y’ and ‘n’ with your two answer column names (without dollar signs).