Hi @Nandheswara, Although you can create multifield using custom clientlibs, but Adobe suggested approach to create a new Content Fragment model using the multifield properties (in your case; Title, Path Field and Dropdown).
For example, Create a "Author" Content Fragment model first like below:
Later add a "Fragment Reference" field (which needs to Render as "Multifield") in Article Content Fragment Model. You can enable "Allow Fragment Creation" for inline Editing when you create new Article Content Fragment.