In the following question, four number pairs are given. The number on left side of (–) is related to the number on the right side of (–) with some Logic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the_x005F_x000D_

• A. 13 – 14
• B. 15 – 16
• C. 24 – 25
• D. 19 – 21