Correct Indra, correct answer is Option - B

How Option C is correct?? Most of the answer in your site are wrong. Below is is the process how Work Definitions Are Created Automatically -

The product manager must follow these steps to create an automatic work definition:

Navigate to the Product Information Management work area and select the Manage Items task.

Search for the item and navigate to the Edit Item page.

On the Structures tab of the Edit Items page, click the Actions menu.

Select the option Create Automatic Work Definition.