AAI ATC Junior Executive 21 Feb 2023 Shift 1 Paper

Question : 109 of 120

Marks: +1, -0

If a̅, b̅, c̅, d̅ are the position vectors of the points A, B, C, D, respectively, such that no three of them are collinear and a̅ + c̅ = b̅ + d̅. then the quadrilateral ABCD is: