1.  10 34 12 31 14 28 16
A. 25 18
B. 30 13
C. 19 26
D. 18 20
E. 25 22

Answer: Option A

Explanation:

Two patterns alternate here. The first pattern begins with 10 and adds 2 to each number to arrive at the next; the alternating pattern begins with 34 and subtracts 3 each time.