How to branch Question in Storyline?

Hi,

I am working on a Storyline project which has 6 questions but  the learners are required to take only 4 question ( out of 6).  

Out of those 6, First 2 are common questions, while remaining 4 are divided in two groups of 2 questions (That means some learners have to take questions 1,2,3,4  and some 1,2,5,6).

As far as branching is concerned, I am able to do that based on values of  two variables (KN and FR). The value of one of these variables changes to true (two buttons are used to set the value)  on first slide (slide before Question 1). 

If KN is true: Learners go to Question 3 after completing question 1,2 

If FR is true: Learners go to Question 5  after completing question 1,2

However, I am having problems with the result slide. Result slide expects score for all 6 question which in my example I do not need to. The result slide is going to be used for tracking on LMS. Is there a way to customize result slide based on values of variables or Slide Branching? 

Thanks,

Hassan