How to create individual incorrect response in MULTIPLE CHOICE (not multiple response) ?

It sounds like you want to give the user different feedback based on what incorrect answer they select for a Multiple Choice question. 

To do that, follow these steps: 

In the QUESTION TOOLS>DESIGN ribbon, go to the Feedback field and select By Choice.

After you select Feedback: By Choice, Storyline will re-arrange the Form View of the question slide. Enter the feedback text in the fields provided. 

After you enter text, Storyline will automatically create layers with that feedback. You can edit the content on those layers, as needed. (Do not rename the layers.) Storyline will automatically show the appropriate layer when the user answers the question. 

Here is the User Guide information about this: Feedback & Branching in Storyline 360 - E-Learning Heroes (articulate.com).

If I misunderstood your question, please provide additional details about what you want to do. 

Thank you Judy.