Scenario: You are tasked to use face service in Azure to identify the gender and age of an individual in a given dataset. You created a FaceClient object, and you plan to use the Face client library in C#. Which method would you call to find the rectangular face coordinates or locations? (choose one answer choice).

Answer options:

A.GroupAsync
B.FindSimilarAsync
C.DetectWithUrlAsync
D.IdentifyAsync

Correct Answer: C
Option A is incorrect because the GroupAsync method is used to divide faces into groups and hence does not meet the requirement criteria.
Option B is incorrect because the FindSimilarAsync method is used to find similar looking faces from an array of FaceIds. It does not meet the requirement criteria either.
Option C is correct because the DetectWithUrlAsync and DetectWithStreamAsync methods can be used to get locations in an image. 
Option D is incorrect because the IdentifyAsync method is used to find one to many closest matches of a specific face.
Reference: To learn more about detecting and analyzing faces, use the link given below: 

https://docs.microsoft.com/en-us/azure/cognitive-services/face/face-api-how-to-topics/howtodetectfacesinimage