Could we use WSHttpBinding with Request-CallBack (also called Duplex) exchange pattern?

HTTP protocol does not support duplex communication — responses are valid only for each request, so the answer is no. This prevents HTTP-based bindings such as BasicHttpBinding and WSHttpBinding from supporting duplex. To address this limitation, WCF provides WSDualHttpBinding. This binding uses composite duplex communication, which means two communication channels are created to support calls in both directions.