I just failed the ITIL RCV exam with 65/100, one of the question that I got 0 point is about request fulfillment and incident management.  I don't think it's a right thing to type the whole question/answer here, however one of the key thing about that question is that:
- when a phone call/email has been arrived to the service desk, is request fulfillment process immediately started, and THEN the request will be categorized and re-routed to incident management if needed (i.e. first started the request fulfillment process, then re-routed to incident management)?
 
- OR it is the service desk who will identify the request, then route the request to either request fulfillment or incident management (i.e. service desk will determine if it is process of request fulfillment or incident management will start)?
 
(a) or (b)?  I picked (a), but I got 0 point on that question.  But why?  I Google'd a bit and tried to figure out the right answer, but I still don't know why I was wrong.  Can anyone explain or provide reference please?   P.S. for those who are wondering, although the syllabus did say that request fulfillment v.s. incident management is in the exam scope, however the 
official RCV handbook does 
NOT have any content to explain about the difference between the two, it only stated it's depending on different organizations blah blah blah.