How to solve These Kind of problems

Question

Answer 1

since jasmine becomes unhappy is samir is there so these 2 can not be invited together

1) jasmine and kanti (both r happy) possible

2)jasmine and samir  not possible

3)kanti and samir     not possible  (as jasmine is not there which is a prerequisite for kanti)

4)all three not possible as jasmine will be unhappy with samir

5) jasmine alone is possible as there is not condition violation for jasmine

6)only samir or kanti not possible

so only no 1) and no 5) r possible