S1 is true for 2 attributed relation ,Relation will be always in 1NF ,2NF,3NF,BCNF
Let relation R1(A,B) A->B ,B->A then R1 is in 1NF,2NF,3NF,BCNF
s2 is not true since minimal form here is removing the FD AB->E from given minimal form we are unable to get that FD so S2 is not minimal form of given FD's
so Option A is correct
S1 is true and S2 is false