Number Series - Verbal and Reasoning

Directions to SolveLook carefully for the pattern, and then choose which pair of numbers comes next.
Q1:

8 12 9 13 10 14 11

A 14 11

B 15 12

C 8 15

D 15 19

E 8 5

ANS:B - 15 12

This is an alternating addition and subtraction series, in which the addition of 4 is alternated with the subtraction of 3.