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. 63 – 67
• B. 17 – 21
• C. 39 – 43
• D. 31 – 37