1.  Choose the odd numeral pair/group in each of the following question :

A. 3, 9, 6, 15
B. 6, 18, 12, 30
C. 4, 16, 12, 24
D. 12, 36, 24, 60

Answer: Option C

Explanation:

In all other groups, the numbers are in the ratio 1: 3 : 2 :5.