To enable users to view the availability and place booking for the books, a book-lending (library) website wants to implement a chat-bot that can help the users. 
To further enhance the experience, you are requested to include the name of the book with its cover page as a large image and 2 buttons. One button to join the waitlist of the book (should the book be currently unavailable) and the other button to read the book. 
Which of the below card would you use?

Answer options:

A.Picture Card
B.Thumbnail Card
C.Hero Card
D.Design Card

Correct Answer: C 
There are multiple rich card options provided in the Azure Bot Service to enhance the user experience. Hero card enables us to provide a card with the ability to tap action, buttons, large image, text of title, and required subtext. 

https://docs.microsoft.com/en-us/azure/bot-service/dotnet/bot-builder-dotnet-add-rich-card-attachments?view=azure-bot-service-3.0#types-of-rich-cards

Correct Answer: C 
There are multiple rich card options provided in the Azure Bot Service to enhance the user experience. Hero card enables us to provide a card with the ability to tap action, buttons, large image, text of title, and required subtext. 

https://docs.microsoft.com/en-us/azure/bot-service/dotnet/bot-builder-dotnet-add-rich-card-attachments?view=azure-bot-service-3.0#types-of-rich-cards