Which pair of words is the odd one out?

D. FISH - SHARK

If 'DOG' is coded as 'GHI', what is the code for 'CAT'?

A. EBU

In the sequence 5, 10, 15, 20, 25, 30, how many times does the number 15 occur?

A. 1

Select the odd number from the following options:

C. 8

Which of the following is a factor of the polynomial x^2 - 5x + 6?

A. X - 2