What is the difference between the relational equi$-$join and natural join operations?Group of answer choicesnatural join results in a relation in which every row from one relation is concatenated to every row from another relationnatural join has an additional step, projecting all except one of the two "duplicate$-$contents" columns from the equi$-$join $($those involved in the join condition$)$equi$-$join has an additional step, selecting only those rows from the natural join for which the join conditions are equalequi$-$join results in a relation containing specified columns from another relation, and natural join results in a relation containing specified rows from another relation