Question:<br/>-<b>Who is the tallest? </b><br/><br/>Possible Answers:<br/><b>0 - Bob is the tallest.</b><br/><b>0 -The tallest is Bob.</b><br/><b>X - He is Bob<br/></b><br/>Why is -<b>'He is Bob</b>.' wrong and how do I explain this to adults who are learning English as a 2nd language?<br/><br/>Also: <br/><b>-It is Bob. </b>Is this answer possible for the same question?