WCF Syndication Feeds

Question

for wcf syndication feeds, which of the following is not true ? 

 

1. "system.ServiceModel.Syndication" namespace comes from system.servicemodel.dll 

2. "Syndication Feed" is the super class of all the feeds related classes

3. WCF Syndication service is hosted by "WebserviceHost" class 

4. WCF syndication service can also be hosted by "ServiceHost" class