On October 1, 2011, Bob took and perfected a security interest in John Doe’s present and after-acquired farm equipment.  The financing statement correctly identified the debtor as John Doe (the name appearing on John Doe’s unexpired Missouri license).  On November 1, 2011 John Doe legally changed the name appearing on his driver’s license to Bill Buck.  Bill Buck informed Bob of the change, but Bob was not concerned.  On December 1, 2011 Bill Buck purchased two new tractors and on April 1, 2012, Bill Buck purchased a new combine.  On April 2, 2012, Bill Buck granted Finance Co. a security interest in his present and after-acquired equipment. 

Which equipment of Bill Buck’s does Bob have first priority in?

1. All of it, whenever acquired

2. Any equipment acquired prior to November 1, 2011

3. None of it

4. Any equipment acquired prior to November 1, 2011, and the two tractors purchased on December 1, 2011.