Which of the following is commonly used to describe the service interface, how to bind information, and the nature of the component’s service or endpoint?

The correct answer is A. WSDL.

WSDL (Web Services Description Language) is an XML-based language that describes a web service. It defines the service interface, how to bind information, and the nature of the component’s service or endpoint.

B. SCD is a Service Component Definition Language. It is a language used to describe the components of a service-oriented architecture (SOA).

C. XML is a markup language that is used to create documents. It is not specifically used to describe web services.

D. None of the mentioned is not a correct answer.