The correct option is A Fibonacci series
Fibonacci series is a series of numbers in which each number is the sum of the two preceding numbers. The series goes in this fashion 0, 1, 1, 2, 3, 5, 8, ...
Here, 0 + 1 = 1, 1 + 1 = 2, 1 + 2 = 3, 2 + 3 = 5, 3 + 5 = 8 and so on.