You plan to use READ API in Azure in order to read printed and handwritten text from a given set of images accessible through a url. You have installed the client libraries and authenticated the computer vision client.You use the ReadAsync method to get the operation id. You then query the service to get read results. 
Given the scenario, review the code below and complete it choosing the most appropriate option 
<pre class="brush:java;">ReadOperationResult results;
Console.WriteLine(""Read File From the Url");
Console.WriteLine();
do
{
results = await client…………………………………(Guid.Parse(operationId));
}
</pre> 

Answer options:

A.AnalyzeImageByDomainInStream
B.AnalyzeImageByDomainInStreamAsync
C.GetReadResultAsync
D.ReadAsync

Correct Answer: C
Option A is incorrect because AnalyzeImageByDomainInStream and AnalyzeImageByDomainInStream methods are used to recognize content within an image by applying a domain-specific model. They are generally used for analyzing celebrities and landmarks.
Option B is incorrect because AnalyzeImageByDomainInStream and AnalyzeImageByDomainInStream methods are used to recognize content within an image by applying a domain-specific model. They are generally used for analyzing celebrities and landmarks.
Option C is correct because the GetReadResultAsync method is used to get OCR results of the Read operation. Here is the completed C# code:
<pre class="brush:java;">ReadOperationResult results;
Console.WriteLine(""Read File From the Url");
Console.WriteLine();
do
{
results = await client.GetReadResultAsync(Guid.Parse(operationId));
}
</pre>
 
Option D is incorrect because the ReadAsync method is called to perform a Read operation. It is an asynchronous call. This call returns a header with Operation-Location. The header contains the URL with Operation Id that is utilized by the Get Read Result Async method to fetch read results from the images.
Reference:
To learn more about read client in OCR, use the link given below: 

https://docs.microsoft.com/en-us/azure/cognitive-services/computer-vision/quickstarts-sdk/client-library?tabs=visual-studio&pivots=programming-language-csharp