Let R(a, b,c)and S(d,e, f) be two relations in which d is the foreign key of S that refers to the primary key of R Consider the following four operations in R and S I.Insert into R II.Insert into S III.Deletion from R IV.Deletion from S Which of the following can cause violation of the relational integrity constraint above?
- A. Both I and IV
- B. Both II and III
- C. All of these
- D. None of these
Answer: B. Both II and III