.Question No. 4 (CLO-2) (5) Discuss the Bayes' theorem and apply this theorem for three urns of the same appearance having the following properties of defective and effective items. Urn A: 1 defective, 2 effective items. Urn B: 2 defective, 1 effective items. Urn C: 2 defective, 2 effective items. One of the urns is selected and an item is drawn from it. It turns out to be a effective. What is the probability that: a) Urn À was chosen? b) Urn B was chosen? c) Urn C was chosen?