You need to build a chatbot that answers questions based on your company's internal knowledge base. The knowledge base consists of Word documents and PDFs. Which service should you use to create a conversational interface that retrieves answers from these documents?
Index documents with Search and use Bot Service for Q&A.
Why this answer
Option D is correct because Azure AI Search can index documents and be used as a data source for a question-answering system, and Azure AI Bot Service can host the chatbot. Option A is wrong because Language Service's QnA Maker (now Custom Question Answering) can use a knowledge base but not directly index documents; it requires a search index for large datasets. Option B is wrong because Document Intelligence extracts data but does not answer questions.
Option C is wrong because Computer Vision does not handle text queries.