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

A. 1, 4, 3, 8
B. 2, 4, 3, 9
C. 3, 2, 3, 8
D. 5, 3, 2, 9

Answer: Option D

Explanation:

In all other groups, the sum of the first three numbers is equal to the fourth number.