Which number should come next in the series? 1 , 1 , 2 , 3 , 5 , 8 , 13

Which number should come next in the series? 1 , 1 , 2 , 3 , 5 , 8 , 13

1. 8

2. 13

3. 21

4. 26

Correct Option: Option C,

21

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Third term is the sum of first two. Fourth term is the sum of second and third. Continuing with this pattern 8th term is the summation of 7th and 6th term. Hence 8th term is 8 + 13 = 21