To which of the following words can you NOT attach the prefix 'im' in order to form a common English word?<br/><br/>Choose one answer.<br/><br/>a. ply <br/><br/>b. ploy <br/><br/>c. pose<br/><br/>d. part <br/><br/>I do not understand what does this question mean. All the answer given, when attach with the prefix 'im', it will form an English word.