Correct Answer - A
`vec(a) .vec(b) = ab cos theta`
projection of `vec(a)` on `vec(b) = a cos theta = (vec(a).vec(b))/(b)`
projection of `vec(b)` on `vec(a) = b cos theta = (vec(a).vec(b))/(a)`
`("projection of" vec(a) "on" vec(b))/("projection of"vec(b) "on" vec(a)) = ((vec(a).vec(b))/(b))/((vec(a).vec(b))/(a))`
`= (a)/(b) = (7)/(13)`