Question: In a 5G System's Network Function Repository Services, what content type is used to signal the use of the Problem Details JSON Object in an HTTP response body?
Option 1: application/json
Option 2: application/3gppHal+json
Option 3: application/problem+json
Option 4: text/json
Explanation: The Problem Details JSON Object is specifically signaled in HTTP responses using the dedicated content type application/problem+json, distinguishing it from general JSON formats and the 3GPP hypermedia format, ensuring accurate interpretation of problem details in response bodies.