- A pair of words are in RR if they have atleast two distinct letters in common.
- A pair of words are in SS if they have atleast three distinct letters in common
For example, (Movies, Science) is both in RR and SS, as the letters s,i and e are in common.
And that's it. There are options after this and no statement is there to clarify if options which are true needs to be selected or the false ones.