If col1 is the PK of Table1 and col5 is the PK of Table2, the following alternative table structures is an example of a _____ relationship. Table1(col1, col2, col3) Table1(col1, col2, col3, col5) Table2(col5, col6, col1) OR Table2(col5, col6)

a. One to many

b. Many to many

c.One to one

d. There is no relationship