Please select the two parts of the Power Virtual Agents topics.

Answer options:

A.Entities
B.Conversation nodes
C.Messages
D.Trigger phrases
E.Questions

Correct Answers: B and D 
To create a Power Virtual Agents bot, you need to author the topic. Topic authoring means to create a new topic and provide the set of trigger phrases that will invoke your bot. 
Power Virtual Agents topics consist of two parts: Trigger phrases and Conversation nodes. Trigger phrases are the list of phrases, keywords, or questions that triggers a bot to provide related information.
Conversation nodes define the bot’s response to users’ inquiries. Nodes display messages, ask questions, and run actions.
Trigger phrases initiate the bot’s topic. You need to provide at least 5-10 semantically different trigger phrases for creating an effective topic (Number 1). After you complete the trigger phrases list, you can add Conversation nodes to your bot using Authoring canvas (Number 2). 

Option A is incorrect because Entities represents information that the bot is trying to identify based on natural language understanding from the customer’s conversation. Custom Entities can extend your bot’s “conversational” abilities to understand a specific domain. Entities are not part of the topic authoring process.
Option C is incorrect because Messages are Conversation nodes` elements and not the main part of the topic authoring process.
Option E is incorrect because Questions are Conversation nodes` elements and not the main part of the topic authoring process.
For more information about Power Virtual Agents topics, please visit the below URL: 

https://docs.microsoft.com/en-us/learn/modules/power-virtual-agents-bots/4-topics