If R and S are two non-empty relations on set A, then incorrect statement is :
A. R and S are reflexive , then `R cap S ` is also reflexive .
B. R and S are symmetric , then `R cup S ` is also symmetric
C. R and S are transitive , then `R cap S ` is also transitive .
D. R and S are transitive , then `R cup S ` is also transitive.