Find the missing number?

Answer: Option D

Logic (Column-wise):
First Element + 4 = Second Element
Second Element + 6 = Third Element.

3 + 4 = 7 +6 = 13
5 +4 = 9 + 6 = 15
So,
1 + 4 = 5 + 6 = 11.
Missing Number= 11.