Traditional Match the Following with lines - Articulate Storyline

I am trying to create a traditional match the following that when an item is dragged onto the correct answer a line appears. Just as its done in the example with Storyline:

http://clickaway.co.in/Demo/Courses/Storyline/D&D_Matching/story_html5.html

I am aware I need to use the drag and drop functionality, however, I am not sure how to get the lines. 

I just need to do it in the same method or format as in the link. 

Thank you