Select the odd pair of words from the list below.

C. STAR - SKY

If 'SUN' is coded as 18, 20, 22 and 'MOON' is coded as 16, 18, 20, 22, what is the code for 'STAR'?

B. 19, 21, 23, 25

Which pair of words is different from the others?

D. FISH - SHARK

Identify the missing letter in the series: a, e, i, o, ?

A. U

If the code for 'CAT' is represented by the numbers 3, 1, 20 and the code for 'DOG' is 4, 15, 7, what is the code for 'BAD'?

A. 2, 1, 4