1.  Choose the correct alternative that will continue the same pattern and replace the question mark in the given series : 11, 13, 17, 19, 23, 25, ?

A. 26
B. 27
C. 29
D. 37

Answer: Option C

Explanation:

The pattern is +2, +4, +2, +4, ..... so missing term = 25 + 4 = 29