Correct Answer: B
Explanation:
Here we see ups and downs in the series so there is a chance of 2 separate series
We can have 20 24 30 38 as one series
And 4 64 196 as other series.
Both series occur alternately so next term has to be of the second series.
In first series difference is
24 - 20 = 4
30 - 24 = 6
38 - 30 = 8
So, difference increases by 2
In second series, We see they are squares i.e. 22, 82, 142
8-2 = 6
14-8 = 6
So next number, ? - 14 has to be = 6
So, ? = 14+6 = 20
So next term is 202 = 400