Find the odd number pair from the following options.

D. (9, 18)

Four students - A, B, C, and D - scored different marks in an exam: 85, 90, 75, and 80. A scored more than B but less than C. D scored the lowest. Who scored 90?

C. C

Which pair of numbers is the odd one out?

C. 4, 6

Identify the odd group of numbers.

D. 12, 14, 16

Select the pair that does not belong with the others.

D. 50, 60