Exam Certified OmniStudio Developer topic 1 question 5 discussion

DR transform can do it and is easier than calling an apex clases.

DR Transform cam convert Json to XML

To meet the requirement of converting the response from a REST API into a specific XML structure before sending it as an input to another external web service in an Integration Procedure that uses an HTTP action, the developer should use the "DataRaptor Transform" element to convert the JSON response to XML. Therefore, the correct answer is A. The "DataRaptor Transform" element can be used to transform data from one format to another, such as from JSON to XML. In this case, the developer can use this element to convert the JSON response from the REST API into the required XML structure before sending it to the external web service.