To recognize specific phrases and intent in a recorded speech, you use Speech and Language Understanding services in Azure. For this configuration you create a SpeechConfig and IntentRecognizer object in your LUIS application. Review the code snippet below below and choose the which SubscriptionKey and ServiceRegion would you use to create SpeechConfig object 
<pre class="brush:java;">var config = SpeechConfig.FromSubscription("SubscriptionKey", "ServiceRegion");
</pre> 

Answer options:

A.Speech service key
B.LUIS primary key
C.LUIS location
D.Speech service location

Correct Answers: B and C
Option A is incorrect because the Speech subscription key is used to create a Speech service. However in the LUIS application, for intent recognition in a given speech, LUIS primary key is used.
Option B is correct because in the LUIS application, for intent recognition in a given speech, LUIS primary key is used. To get that you go to the LUIS prediction resource section of Azure resource under the Manage blade of the LUIS portal.
Option C is correct because you need to provide the LUIS service location or Azure region where LUIS service is provisioned. 
Option D is incorrect because the location for the LUIS service hosting region needs to be provided instead.
Reference:
To learn more about SpeechConfig object creation for intent recognition, use the link given below: 

https://docs.microsoft.com/en-us/azure/cognitive-services/speech-service/get-started-intent-recognition?pivots=programming-language-csharp