Character Puzzles - Verbal and Reasoning

Q1:

Which one will replace the question mark ?

A 18

B 20

C 21

D 19

ANS:B - 20

Explanation: 1 + 2 + 3 + 4 = 10 and 1 + 3 + 5 + 8 = 17 Similarly, 1 + 4 + 6 + 9 = 20.