a, b are the magnitudes of vectors vec(a) & vec(b). If vec(a)xx vec(b)=0 the value of vec(a).vec(b) is

a, b are the magnitudes of vectors vec(a) & vec(b). If vec(a)xx vec(b)

1.	a, b are the magnitudes of vectors vec(a) & vec(b). If vec(a)xx vec(b)=0 the value of vec(a).vec(b) is
Answer» 0 `SQRT(AB)` ab a/b Answer :C