To answer this question, we need to understand the different types of operations in WSDL (Web Services Description Language).
A. One-way - This option is correct as it is one of the WSDL operation types. In a one-way operation, the client sends a request to the server, but no response is expected.
B. Error-message - This option is incorrect. Error-message is not a valid WSDL operation type. WSDL operation types include one-way, request-response, and solicit-response.
C. Request-response - This option is correct as it is one of the WSDL operation types. In a request-response operation, the client sends a request to the server and expects a response.
D. Solicit-response - This option is correct as it is one of the WSDL operation types. In a solicit-response operation, the server sends a request to the client and expects a response.
E. None of the above - This option is incorrect as both A and C are valid WSDL operation types.
F. Only A and B - This option is incorrect as only option B is incorrect. Option A is a valid WSDL operation type.
Therefore, the correct answer is option B. It is NOT a WSDL operation type.