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In following number series, two terms have been put within brackets. Choose the appropriate option

Which number replace question mark in the series 7, 12, 19, ?, 39.

Option:
A. 29
B. 28
C. 26
D. 24
Answer: B . 28

Justification:

Clearly, the given sequence follows the pattern:
+5, +7, +9 ...  i.e., 7 + 5 = 12,  12 + 7 = 19, ... .
.'. Missing Number = 19 + 9 = 28.
Hence, the answer is (b).

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