The following basket has six different combinations of items identified by a number tag printed on individual items. What would be the Confidence that a customer also buys item 3 when he/she buys item 1 (i.e 1 => 3), according to Market-Basket rule ? ([1, 2, 3], [2, 4], [1, 3, 4, 2], [2, 3], [1, 3, 4], [1, 2, 4])

(A) 25%

(B) 100%

(C) 75%

(D) 50%