Which of the following sentenc is correct?<br/><br/>1.He said he feels comfortable living in Hong Kong,which he moved to in 2008 after being forced to leave South Korea.<br/><br/>2.He said he feels comfortable living in Hong Kong, where he moved to in 2008 after being forced to leave South Korea. <br/><br/>3.He said he feels comfortable living in Hong Kong, to which he moved in 2008 after being forced to leave South Korea. <br/><br/>4.He said he feels comfortable living in Hong Kong, where he moved in 2008 after being forced to leave South Korea.