Question Statement :

In a quadrilateral ABCD, AC and BD intersect at O such that AB = 16 cm, AO = 15 cm, OB = 5 cm, BC = 13 cm, OC = 12 cm, OD = 9 cm and CD = 15 cm. If it is given that one of the dimensions out of AB, BC and CD is incorrect and all the other dimensions are correct, then the incorrect dimension is