Column I, Column II If `| vec a+ vec b|=| vec a+2 vec b|` , then angel between ` vec aa n d vec b` is, p. `90^0` If `| vec a+ vec b|=| vec a-2 vec b|` , then angel between ` vec aa n d vec b` is, q. obtuse If `| vec a+ vec b|=| vec a- vec b|` , then angel between ` vec aa n d vec b` is, r.`0^0` Angle between ` vec axx vec b` and a vector perpendicular to the vector ` vec cxx( vec axx vec b)` is, s. acute