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In the following question, a matrix of certain characters is given. These characters follow a certain trend, row-wise or column-wise. Find out this trend and choose the missing character accordingly.

3 15 4
7 38 5
3 ? 5

Option:
A. 15
B. 18
C. 19
D. 20
Answer: B . 18

Justification:

In the first row, 3 x 4 + 3 = 15.
In the second row, 7 x 5 + 3 = 38.
.'. In the third row, missing number = 3 x 5 + 3 = 18.

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