Number Series - Verbal and Reasoning

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

1 10 7 20 13 30 19

A 26 40

B 29 36

C 40 25

D 25 31

E 40 50

ANS:C - 40 25

Here, every other number follows a different pattern. In the first series, 6 is added to each number to arrive at the next. In the second series, 10 is added to each number to arrive at the next.